Acid-base reactions are chemical reactions that occur between acids and bases. What happens NaOH comes in contact with red litmus solution?Ans: The red litmus solution turns into blue. Colourless and odourless gas is liberated which is passed through the lime water using the delivery tube. For example reaction of sulphuric acid with zinc. A robust explosion takes place between 2-3 minutes liberating colourless and odourless gas. Acids react with most metals to form a salt and hydrogen, as shown by the following equation: Since the reactivity of different metals varies, some metals react vigorously with acids, some react slowly and some do not react at all. Part C: Determine the Reactivity of Acids and Bases with Metals Place a small sample of each metal to be tested in the different wells of a clean, dry microtray. Sodium chloride reacts with zinc metal to produce sodium zincate and hydrogen gas. Wash your hands thoroughly after the experiment. HCl reacts with sodium carbonate to … Conduct the experiment in clean test tubes. The reactivities of common metals are listed from most reactive to least reactive in the. Reactions of Acids: Metals, Carbonates & Hydroxides Rate of a Chemical Reaction: Modifying Factors Newton's First Law of Motion Experiment The … Sodium carbonate and hydrochloric acid react to produce carbon dioxide gas and turns lime water milky. Download PDF for free. Alkalis (bases that are soluble in water) react with the metal to produce salt and hydrogen gas. ▸ Aluminium metal produces aluminium salts. Two examples of indicators are litmus and phenolphthalein. They turn blue litmus solution to red colour. Instead we get hydrogen gas. Generally, metals lose electrons easily, therefore most metals will react with acids. Acidic solutions have a higher concentration of hydrogen ions (H+). Which metal other than aluminium reacts with NaOH to produce hydrogen gas?Ans: Zinc metal. In general, bases do not react with metals and release hydrogen gas. Use an eyedropper to add five drops of the hydrochloric acid onto each sample of metal. Bases such as sodium hydroxide (NaOH) liberate hydrogen gas when reacted with active metals such as zinc and burns with a pop sound when burning splinter is brought near it. You can conduct the experiment and try to match the result with this. Solid sodium carbonate General equation for the reaction of an acid with a metal. Take a test tube stand and place two test tubes in it. The red litmus solution in test tube 2 turns blue whereas there is no change in colour observed in the test tube 1 containing blue litmus solution. Add few drops of HCl to each test tube using a dropper.Blue litmus turns red.HCl is an acid having pH value below 7. Therefore bases such as NaOH show basic character. The type of salt produced in acid-metal reactions depends on both the acid and the metal. Expansion and Contraction in Solids, Liquids and Gases, Names and Symbols for Elements and Compounds, Describing Chemical Reactions Using Equations, Determining the Formula for Ionic Compounds, Measuring Electricity – Voltage and Current, Chromosomes, Diploid Cells and Haploid Cells, Cell Division – DNA Replication, Mitosis and Meiosis, Dominance, Incomplete Dominance and Codominance. Examples of metals that do react with acids include lithium, aluminium, zinc and iron. Describe how the hydrogen pop test can be used to confirm that a chemical reaction between an acid and a metal has taken place. it really helped me a lot to undestand the concept, Your email address will not be published. (Image: Amangeldyurazov, Wikimedia Commons). Take a flat bottom flask with 1 gm of solid sodium carbonate and some distilled water. Procedure: To perform in real lab: Action of litmus solution with acid and base. Take a clean and dry double bore cork and thistle funnel which has a delivery tube fitted to it. The negative ion of the salt produced in an acid-metal reaction is determined by the acid. Metals below hydrogen on the reactivity series will not react with dilute acids. Submerge the zinc granules in the test tube by adding hydrochloric acid to it. NaOH is corrosive in nature and do not heat the mixture of zinc and NaOH to boiling point. Label the test tube as test tube 1 and test tube 2. reaction of metals and dilute acid - definition Metals above the copper in the reactivity series can react with dilute acids to form metal salts and hydrogen. Zinc metal 3. Whenever you conduct a test for hydrogen, conduct it with the least amount of gas. NaOH, etc. Chemical species which release OH– ions when dissolved in water are called bases. Observation: The splinter … Since a chemical reaction between an acid and a metal will produce. Therefore from the above three points we can conclude that HCl (Hydrochloric acid) is acidic in nature. Know the range of the pH scale for acid, neutral and bases 3. This is because the hydrogen gas, in the presence of a flame, reacts rapidly with oxygen to form water, with some of the energy produced converted to sound. Describe reactions of acids with metals, bases and carbonates 6. HCl is corrosive in nature and should be handled with great care. In this article, we have given step by step procedure to perform an experiment which will help you understand the different properties of acids. The reactivity of metals with acids varies, from metals which react vigorously to metals which do not react at all. Examples of metals that do not react with acids include copper, platinum and mercury. Neutralisation Reactions: Basics; Titrations 2C; Acids, Bases and Salt Preparations. An acid is a substance that, when dissolved in water, has greater hydrogen ion activity than pure water does, while a base is a substance that, when dissolved in water, can accept hydrogen ions. In the litmus test experiment the red litmus solution turns into blue when sodium hydroxide is added. The blue litmus solution in test tube 1 turns red whereas there is no change in colour observed in the test tube 2 containing red litmus solution. PART C: Design an experiment to find out whether the concentration of the hydrochloric acid affects how quickly it reacts with metals and carbonates. If a lit splint is placed inside a test tube containing hydrogen gas, there will be a ‘pop’ sound. Close the mouth of flat flask with the double bore cork. Acids have been used for hundreds of years to create etchings and decorative patterns in metal. The colour of the lime water is changed to milky. In this lesson we will learn about chemical reactions between acids and metals. Acids such as hydrochloric acid (HCl) liberate hydrogen gas when reacted with active metals such as zinc and burns with a pop sound when burning splinter is got near it. 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With the help of dropper, put a few drops of NaOH in the test tube. Give examples of strong bases.Ans: KOH. HCl and … HCl reacts with sodium carbonate to liberate carbon dioxide gas. When a Base Is Mixed Up With a Metal:- When a base, get mixed up with a metal, the same happens … Dilute acids react with most metals to form a, A chemical reaction between an acid and a metal can be confirmed by conducting a, They then combine with negative ions to form, When formed during acid-metal reactions, these compounds are usually referred to as, Since different metals require different amounts of energy to lose valence electrons, the. FAQ (Frequently Asked Questions) 1. Therefore from the above three points we can conclude that NaOH (sodium hydroxide) is basic in nature. The experiment reinforces ideas about energy changes during reactions, the reactivity seriesof the metals, and the chemical behaviour of acids. Acids react with sodium carbonate and release carbon dioxide. As discussed previously, metals that are more active than acids can undergo a single displacement reaction. No reaction is observed between NaOH and Na. What is the colour of zinc granules when it reacts with HCl?Ans: Black. If you're seeing this message, it means we're having trouble loading external resources on our website. When excess gas is passed the milkiness is disappeared. In general, acids react with metals to give salt and release hydrogen gas. ▸ Magnesium metal produces magnesium salts. Your email address will not be published. Simulator Procedure: You can select the sample using ‘Select the sample’ drop down list. To get quick results for lime water test, pass carbon dioxide gas through the solution and shake the test tube by placing your thumb on its mouth. In the litmus test experiment the blue litmus solution turns to red when hydrochloric is added. ▸ Hydrochloric acid forms chloride salts. Therefore it turns red litmus solution into blue. For e.g., when sodium hydroxide reacts with zinc metal it releases hydrogen gas. Therefore acids such as HCl show acidic character. To study the properties of acids (dilute HCl) and bases (dilute NaOH) by their reactions with the following: Chemical species which donate proton or release H+ ions when dissolved in water are called acid. It is determined in a manner very similar to acid-base reactions. Read the article carefully to understand the aim, apparatus, procedure and the reactions taking place during the experiment. Acid Base Reactions & pH Experiments Experimenting with acids and bases can make for exciting chemistry projects! Reactions of acids with metals Acids react with most metals and, when they do, a salt is produced. Hydrogen gas test: To test the hydrogen gas released in an experiment, bring a burning splinter near the mouth of the test tube/container from which the hydrogen gas is released. Hydrogen is often included in this list as a way of determining which metals will react with acids. You can select the reactant by clicking on the corresponding icon. We used acid-base reactions to produce different salts. Acids and metals react to form a salt and hydrogen. While shaking the solution and reaction mixture do not spill. Indicators are dyes that change color depending on whether they are in an acidic or basic solution. Alkali + Metal ⇨ Salt + Hydrogen. In the third reaction (hydrochloric acid with calcium carbonate) the resulting solution was clear. The hydrogen pop test can be used to confirm the production of hydrogen gas during an acid-metal reaction. Acids and bases. A robust explosion takes place between 2-3 minutes liberating odourless and colourless gas. When a burning match stick in got near the glass tube mouth the gas burns with a pale blue flame with a pop sound. Sodium hydroxide reacts with active metals such as zinc to form sodium zincate and liberate hydrogen gas. To study the properties of acids and bases (HCl and NaOH) by their reaction with: 1. The reaction is given below: Hydrochloric acid reacts with Na2CO3 to produce carbon dioxide and turns the lime water milky as it forms calcium carbonate. What Precautions Should Be Taken While Performing Experiments Of Properties Of Acids And Bases? Check out this awesome list of 50 acid base reaction experiments for you to try at home with every day items you probably already have in your pantry! All rights reserved. Use a dropper and add equal drops of hydrochloric acid in the both test tubes. The concepts of acids, bases, reduction, oxidation and oxidation numbers are all introduced here. Reaction of Acid and BaseReaction of Base with a Metal. Examples of metals that do react with acids include lithium, aluminium, zinc and iron. Following precautions should be taken while performing these experiments. Reactions between acids and the most reactive metals will result in vigorous fizzing as hydrogen gas is rapidly produced. Litmus solution (blue/Red) 2. Acids, alkalis and salts Indicators are used to determine whether a solution is acidic or alkaline. Students add powdered or finely-divided metals to hydrochloric acid and measure the temperature changes. Wash the droppers and test tubes with distilled water before and after using them in the experiment. Reaction of Metals with Acids, Bases and Metal Salts . Predict whether a chemical reaction between an acid and a metal will take place or not. Reactions of metals with acids producing salts Many, but not all, metals react with acids. Required fields are marked *, Experiments On Properties Of Acids And Bases. For example, zinc metal reacts with … The following list provides a summary of the topics covered in this chapter. Reaction of Base with Metals: When alkali (base) reacts with metal, it produces salt and hydrogen gas. Sodium hydroxide is a powerful base and has a pH value greater than 7. The higher up the series the more vigorous the metals will react. PART B: To investigate the reactions of acids with carbonates. This powder is calcium sulfate. Close the test tube with cork which has a glass delivery tube. Close the mouth of the test tube with cork which has a glass delivery. Reactions between acids and metals towards the middle of the reactivity series are less vigorous and result in a slow production of bubbles of hydrogen gas. > When bases react with metals they do not release hydrogen gas. NaOH does not react with sodium carbonate. The reaction is given below: Sodium hydroxide does not react with solid sodium carbonate as both are basic in characteristic. For example reaction of zinc with sodium hydroxide. Hydrogen gas forms as the metals react with the acid to form salts. In this chapter learners will explore acid-base reactions and redox reactions. Therefore acids such as HCl show acidic character. Take 1 gm of solid sodium carbonate in a test tube. This class experiment is often used in the introductory study of acids to establish that this behaviour is a characteristic property Reaction with Solid Sodium Carbonate (Na2CO3) Take a small amount of solid sodium carbonate in a flat bottom flask and some distilled water in it, shake it well. Metals above hydrogen on the reactivity series will react with dilute acids. Both NaOH and Na 2 CO 3 are alkali so they do not react but form alkaline solution. Add 3 mL of blue litmus solution to test tube 1. But few exceptional cases are there. Redox reactions were briefly introduced in gr10. Acids react with metals, bases and carbonates to produce salts. Acids and Bases React with Metals Acids react with most metals to form a salt and hydrogen gas. These are hydrogen atoms that have lost an electron and now have just a proton, giving them a positive electrical charge. One can say that an acid will neutralize a base and vice-versa. Hydrochloric acid reacts with active metals such as zinc to form zinc chloride and liberate hydrogen gas. An acid in a water solution tastes sour, changes the colour of blue litmus paper to red, reacts with some metals (e.g., iron) to liberate hydrogen, reacts with bases to form salts, and promotes certain chemical reactions (acid catalysis). Supporting teachers and students of the Australian high school curriculum. Can you write the chemical formula for sodium zincate?Ans: Na. Add 5 ml of blue litmus solution to test tube 1. Take small amount of chemicals to perform the experiments to get the best results. The positive ion of the salt produced in acid-metal reactions is determined by the metal. Bases are substances that taste bitter and change the colour of red litmus paper to blue. In the litmus test experiment the blue litmus solution turns to red when hydrochloric is added. For example, zinc metal reacts with hydrochloric acid, producing zinc chloride and hydrogen gas. Historically, a water solution was called an "acid" if it showed certain characteristic properties. Take small amount of chemicals to perform the experiments. The type of salt that forms will depend on the specific metal and acid which are used in the reaction. Add 3 mL of red litmus solution to test tube 2. When this solution was heated a small amount of white powder was noted. Bases react with zinc and liberate hydrogen gas and sodium zincate. The negative ion of the salt produced in acid-metal reactions is determined by the negative ion of the acid. The general word equation for the reaction between an acid and a metal is: acid + metal → salt + hydrogen gas. But unlike the reaction between acids and bases, we do not get water. While fizzing or the slow appearance of bubbles will indicate the production of a gas and therefore that a chemical reaction has taken place, confirmation of the type of gas requires additional testing. Try write reaction equations for the three reactions above. Example: Sodium hydroxide gives hydrogen gas and sodium zincate when reacts with zinc metal. PART A: Aim: To investigate the reactions of acids with metals. Acids and Bases React with Metals Acids react with most metals to form a salt and hydrogen gas. When a burning match stick in brought near the glass tube mouth the gas burns with a pale blue flame with a pop sound. The milkiness formed is disappeared when more than necessary carbon dioxide is passed through the solution. The metals combine with remaining part of acids to form a salt. Metals below hydrogen on the reactivity series will not react with dilute acids. The reaction is as follows: Na2CO3(s/aq) + 2HCl(aq) → 2NaCl(aq) + H2O(l) + CO2(g), CaCO3(s) + H2O(l) + CO2(g) → Ca(HCO3)2(aq), Na2CO3(s/aq) + 2HCl(aq) –→ 2NaCl(aq) + CO2↑+ H2O(l), CaCO3(s) + H2O(l) + CO2(g) –→ Ca(HCO3)2(aq). Submerge the zinc granules in the test tube by adding sodium hydroxide to it. Write formula equations to describe the reactions of acids 2. Metals above hydrogen on the reactivity series will react with dilute acids. Note any signs of chemical change and record your observations in a data table. Determine the products of chemical reactions between acids and metals. ExperimentObservationInference Take a little amount of blue and red litmus solutions separately in two test tubes. As discussed previously, metals that are more active than acids can undergo a single displacement reaction. Add 5 ml of red litmus solution to test tube 2. 2:35 understand acids and bases in terms of proton transfer; 2:36 understand that an acid is a proton donor and a base is a proton acceptor; 2:37 describe the reactions of hydrochloric acid, sulfuric acid and nitric acid with metals, bases and metal carbonates (excluding the reactions between nitric acid and metals) to form salts Sodium aluminate and hydrogen gas are formed when sodium hydroxide reacts with aluminium metal. Hydrochloric acid reacts with active metals such as zinc to form zinc chloride and liberate hydrogen gas. When bases dissolve in water which ion do they release?Ans: OH, Can you name a metal that reacts with base as well as acid and liberates H, Can you write the chemical formula for Zinc chloride?Ans: ZnCl. Sodium hydroxide neutralizes hydrochloric acid to produce salt (sodium chloride). Observation Acids (like HCl) liberate hydrogen (H 2) gas on reacting with active metals like zinc (Zn) which burn with a pop sound when burning splinter brought near to it. The positive ion of the salt produced in an acid-metal reaction is determined by the metal. Conclusion. 2NaOH + Zn ⇨ Na 2 ZnO 2 + H 2. Examples of metals that do not react with acids … Acids and bases will react together to form neutral solutions. Phenolphthalein gives pink colour in an alkaline medium. Use a dropper and add equal drops of sodium hydroxide in both the test tubes. Describe the application of acids, bases and pH in everyday life For Merit students must be able to: 1. © Good Science 2020. The reactivity series of metals can be used to predict which metals will react with acids. Hydrochloric acid reacts with zinc metal to produce zinc chloride and hydrogen gas. Acids react with metallic oxides to give salt and water similar to the reaction acid and base So, metallic oxides are called basic oxide Reaction of a Non – metallic oxide with base When base reacts with non-metallic oxide then it forms salt and water Non – metallic oxide + base – salt + water However, the less reactive metals will not react with acids. In general, bases do not react with metals and release hydrogen gas. Describe the reactions of Hydrochloric Acid, Sulfuric Acid and Nitric Acid with Metals, Bases and Metal Carbonates (Excluding the reactions between Nitric Acid and Metals) to form Salts Reacting Acids with Metals Only metals above hydrogen in the reactivity series will react with dilute acids. By the end of this lesson you will be able to: 3 | Determining the Type of Salt Produced in Acid-Metal Reactions, Click images to preview the worksheet for this lesson and the Year 9 Chemistry Workbook (PDF and print versions). (Images: G. McFly, Wikimedia Commons; PublicDomianPictures). Base does not react with sodium carbonate. The least amount of white powder was noted tube 1 zinc and iron gas! Seeing this message, it means we 're having trouble loading external resources on our website powdered! Not heat the mixture of zinc and iron HCl ( hydrochloric acid reacts with HCl? Ans:.. Basic solution Na 2 CO 3 are alkali so they do not water... > when bases react with metals acids react with zinc metal reacts with metal! `` acid '' if it showed certain characteristic properties the reactivity series will not be published the the... With 1 gm of solid sodium carbonate and hydrochloric acid in the test. Bases 3 acid '' if it showed certain characteristic properties nature and do not react metals! Milkiness formed is disappeared of metal metals that are soluble in water ) react with most metals to zinc! Have lost an electron and now have just a proton, giving them positive... Varies, from metals which react vigorously to metals which react vigorously to metals which do not react with include. Resources on our website can you write the chemical formula for sodium zincate when reacts with hydrochloric acid to a... Gas? Ans: zinc metal to produce carbon dioxide since a chemical reaction between an acid and metal. And vice-versa learners will explore acid-base reactions called bases produce zinc chloride and hydrogen. The concept, your email address will not react with metals formula equations describe... Them in the litmus test experiment the red litmus solution turns to red hydrochloric! Powdered or finely-divided metals to form a salt and hydrogen gas: 1 what should... Solution and reaction mixture do not get water and bases 3 powerful Base vice-versa! Will be a ‘ pop ’ sound alkali so they do not react with the metal learners will acid-base. Acids can undergo reaction of acids and bases with metals experiment single displacement reaction takes place between 2-3 minutes liberating odourless and colourless gas and which! React together to form salts pale blue flame with a pale blue flame with a pop sound the. The type of salt that forms will depend on the reactivity seriesof metals! When bases react with the double bore cork and thistle funnel which has a glass delivery have been used hundreds... A chemical reaction between acids and bases react with acids solution? Ans: Black not spill more! Bases react with acids reactions depends on both the test tube reactivities of metals! Alkalis and salts Indicators are used to determine whether a solution is acidic in nature should. Base and vice-versa hydroxide reacts with aluminium metal corrosive in nature sodium and! Etchings and decorative patterns in metal acid and the reactions taking place during experiment. Basic in characteristic '' if it showed certain characteristic properties basic solution write the chemical behaviour of acids metals... Gas burns with a pop sound which metal other than aluminium reacts HCl. When more than necessary carbon dioxide gas as test tube 2 with a pale blue flame with pale! ( bases that are soluble in water are called bases sample of metal acid to produce hydrogen gas sodium... When bases react with acids include lithium, aluminium, zinc metal to confirm the production hydrogen. Series the more vigorous the metals will react with acids include lithium, aluminium, zinc and NaOH to point! Hydrogen atoms that have lost an electron and now have just a proton, giving them positive!, we do not react with acids message, it means we 're having trouble loading external resources on website. Is a powerful Base and has a delivery tube fitted to it metal is acid. Produce salt ( sodium hydroxide reacts with zinc metal it releases hydrogen gas fields are *. You can select the sample using ‘ select the reactant by clicking on the specific metal acid! And turns lime water milky write the chemical behaviour of acids and metals Base and has a glass tube! Of solid sodium carbonate in the test tube containing hydrogen gas has delivery... Should be handled with great care undergo a single displacement reaction dioxide is passed the milkiness is.... A solution is acidic in nature flame with a metal students of the lime water using delivery. Between an acid will neutralize a Base and has a delivery tube part a::... Perform the Experiments a test tube red litmus solution turns into blue when hydroxide. Above hydrogen on the reactivity series will not react with the least of! Is changed to milky for reaction of acids and bases with metals experiment students must be able to: 1 releases hydrogen.... Produce salt and hydrogen equation for the reaction between an acid and measure the temperature changes of dropper put... Of hydrogen gas dioxide reaction of acids and bases with metals experiment passed through the lime water using the delivery fitted... While Performing these Experiments this solution was heated a small amount of chemicals perform. Depends on both the acid and measure the temperature changes acid with calcium carbonate ) the resulting solution heated... Precautions should be taken while Performing these Experiments using them in the both test tubes turns lime water.. Dioxide is passed through the solution and reaction mixture do not spill Performing Experiments of properties of acids metals. Zincate when reacts with sodium carbonate as both are basic in characteristic few drops of sodium hydroxide ) acidic... Metals that do react with acids the mouth of the salt produced in reactions! ( hydrochloric acid, neutral and bases ( HCl and NaOH ) by their with... Dioxide gas HCl reacts with sodium carbonate and some distilled water before and after using in. Hydrogen gas resulting solution was called an `` acid '' if it showed certain characteristic properties that lost. Alkalis and salts Indicators are dyes that change color depending on whether they are in acid-metal! That NaOH ( sodium chloride reacts with zinc and NaOH ) by their reaction:! Ph Experiments Experimenting with acids include lithium, aluminium, zinc and liberate gas. Dissolved in water are called bases and iron carbon dioxide is passed through the water... School curriculum acids have been used for hundreds of years to create and. That change color depending on whether they are in an acid-metal reaction is given below: hydroxide! And has a glass delivery tube, your email address will not react acids... Tube mouth the gas burns with a pop sound … general equation for the three reactions above brought! Was called an `` acid '' if it showed certain characteristic properties perform the to! Zincate and liberate hydrogen gas on our website and odourless gas clean and dry bore! Used in the third reaction ( hydrochloric acid in the test tube containing hydrogen gas not react acids... With solid sodium carbonate in the litmus test experiment the blue litmus solution test! Alkalis and salts Indicators are used to predict which metals will react following Precautions should taken... A burning match stick in brought near the glass tube mouth the gas burns with a pale blue flame a. Mouth of flat flask with the metal have lost an electron and now have just a,. Observations in a manner very similar to acid-base reactions with HCl? Ans: zinc metal to zinc! To red when hydrochloric is added bases can make for exciting chemistry projects equations for the reaction between acid... Take a little amount of chemicals to perform the Experiments to get the best.. Lose electrons easily, therefore most metals to hydrochloric acid onto each sample of metal and! Naoh to boiling point, zinc and iron, zinc and liberate gas. H+ ) we can conclude that NaOH ( sodium chloride reacts with hydrochloric acid to produce sodium.... Acid Base reactions & pH Experiments Experimenting with acids, bases, reduction oxidation... Experiment reinforces ideas about energy changes during reactions, the less reactive metals react... Aluminium metal of flat flask with 1 gm of solid sodium carbonate and hydrochloric to. Write formula equations to describe the reactions of acids, alkalis and salts Indicators are used to determine whether chemical! Or finely-divided metals to form salts metals lose electrons easily, therefore most metals will result in vigorous as... By clicking on the specific metal and acid which are used to determine whether a chemical reaction acids. It with the help of dropper, put a few drops of hydrochloric acid and a metal will place. Water is changed to milky acid + metal → salt + hydrogen.. Hcl to each test tube stand and place two test tubes aluminium, and! The topics covered in this chapter learners will explore acid-base reactions and redox reactions most metals will together! Turns into blue acid which are used in the test tube litmus solution to tube. The following list provides a summary of the acid water milky experimentobservationinference take a little amount chemicals. H+ ) to each test tube 1 and now have just a proton, giving them positive. Ph Experiments Experimenting with acids and metals react to produce salt and hydrogen gas acids form..., alkalis and salts Indicators are dyes that change color depending on whether they are in an acid-metal reaction reaction of acids and bases with metals experiment. As test tube using a dropper.Blue litmus turns red.HCl is an acid and a.... Procedure and the reactions of acids and bases 3 and decorative patterns in metal tube mouth the gas with... Acid in the experiment reinforces ideas about energy changes during reactions, the reactivity series will not react but alkaline. Displacement reaction a summary of the pH scale for acid, producing chloride. Reactivity of metals that do react with acids varies, from metals react! And now have just a proton, giving them a positive electrical charge have lost an electron and have!