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To find out what acid and metal will form after they react

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Introduction

Objective: To find out what acid and metal will form after they react Introduction: Acids are substances which release hydrogen ions in an aqueous solution. They have a sour taste, examples such as lemons, vinegar, or even the digestion fluid in our stomach. What do acids do? They contain hydrogen ions; they release these ions when reacting with other substances and form new products. Many metals and substances react with acids, and the reaction in between is like this: Acid + Metal oxide (Metal hydroxide) Salt + Water Acids + Carbonates Carbon dioxide + Salt + Water Acids + Metals Salt + Hydrogen I am going to investigate the reaction of an acid and a metal in this experiment. I am going to test with two very common acids, hydrochloric acids, which are contained in our stomach digestion fluid, and ethanoic acids, which are known ad vinegar as well. The reactants I am going to use are Magnesium ribbon, which is a metal, marble chip, which contain carbonate, and Copper Oxide, which is a metal oxide. According to the three chemical formulas of acids' reactions above, I predict these three kinds of chemicals will form a salt and water, carbon dioxide and salt and water, salt and hydrogen respectively, when they react with the acid. An acid can be strong or weak. ...read more.

Middle

Add a piece of magnesium ribbon to the first test tube 5. Add a spatula measure of marble chips to the second test tube 6. Add a few drops of Universal Indicator solution to the third test tube of acid 7. Add a spatula measure of copper (??) oxide to the fourth test tube of acid 8. Gently shake the mixture to react the copper (??) oxide 9. Let the solid in that test tube settle 10. Rinse the test tubes with tap water 11. Repeat step 1-10 with dilute ethanoic acid Diagram: Results: Description of observation when reactions take place: Dilute Hydrochloric Acid Dilute Ethanoic Acid Magnesium Ribbon It turns into hot liquid. The solution turns into milky white. When reacting, there are bubbles and heat is given off. Water vapours is present and gas is coming out The solution turns white. Bubbles are present and moving in fast movement. Gas is coming out as well Marble Chips The chip is slowly being dissolved. There are little white bubbles and some gas. But no heat White little bubbles rising up slowly. Chips gradually being dissolved Universal Indicator No vigorous reaction. The colour turns red PH: 1 The colour turns red. No other reaction PH: 2 Copper (??) Oxide The solution turns black when copper (??) oxide mixes with the acid. ...read more.

Conclusion

There is little heat because chemical reaction is taking place, the precipitate is the salt formed after the reaction. Why are the solutions, hydrochloric acid and ethanoic acid, having the similar results? As the experiment of the third test tube shows, these two solutions are both acids. They have the similar patterns of behaviour during chemical reactions; therefore they will have similar reactions with different kinds of substances. Why don't we use a concentrated acid instead of a dilute acid? A concentrated acid is very dangerous; it may have violent reactions with other substances. It is also very corrosive and can even dissolve body tissue! A dilute acid is safer, but also can take chemical reactions. Strong acids like hydrochloric acids are very corrosive too, so we have to make it dilute to make it less harmful. Conclusion: The experiment shows that acids can react with different types of substances and produce different types of products. In this experiment we have investigated three types of reactants, which is metal, carbonates and metal oxides. They form different kinds of substances when they react with acids. When a metal reacts with an acid, hydrogen and salt will be formed. When acids react with carbonates, carbon dioxide and salt and water will be formed. When metal oxides react with acids, salt and water will be formed. Chemical reactions take place and the acids give off the hydrogen to react. Acids can also dissolve substances, like metals and carbonates. Errors and Improvements: ...read more.

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