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Unit 20 Oxidation and reduction Activity 20.4 Investigating the action of dilute and concentrated sulphuric acids on metals / Reference in textbook: Section.

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Presentation on theme: "Unit 20 Oxidation and reduction Activity 20.4 Investigating the action of dilute and concentrated sulphuric acids on metals / Reference in textbook: Section."— Presentation transcript:

1 Unit 20 Oxidation and reduction Activity 20.4 Investigating the action of dilute and concentrated sulphuric acids on metals / Reference in textbook: Section ST

2 Unit 20Oxidation and reduction Activity 20.4 Investigating the action of dilute and concentrated sulphuric acids on metals (S)/(T) Observations 9Record your observations.

3 Unit 20Oxidation and reduction Activity 20.4 Investigating the action of dilute and concentrated sulphuric acids on metals (S)/(T)

4 Unit 20Oxidation and reduction Activity 20.4 Investigating the action of dilute and concentrated sulphuric acids on metals (S)/(T) Discussion 10a)Is there any gas given off when dilute sulphuric acid is added to copper? _____________________________________________________________ b) If your answer to (a) is yes, name the gas and explain your answer. _____________________________________________________________ c) Is there any gas given off when dilute sulphuric acid is added to zinc? _____________________________________________________________ No Yes

5 Unit 20Oxidation and reduction Activity 20.4 Investigating the action of dilute and concentrated sulphuric acids on metals (S)/(T) 10d)If your answer to (c) is yes, name the gas and explain your answer. ________________________________________________________________ e)Does dilute sulphuric acid act as a typical acid or an oxidizing agent in the reactions? ________________________________________________________________ Dilute sulphuric acid acts as a typical acid. Hydrogen; dilute sulphuric acid shows all the typical properties of a dilute acid; it reacts with zinc to give hydrogen.

6 Unit 20Oxidation and reduction Activity 20.4 Investigating the action of dilute and concentrated sulphuric acids on metals (S)/(T) 11a)Is there any gas given off when concentrated sulphuric acid is added to copper? ______________________________________________________________ b)If your answer to (a) is yes, name the gas and explain your answer. ______________________________________________________________ c)Is there any gas given off when concentrated sulphuric acid is added to zinc? ______________________________________________________________ Yes Sulphur dioxide; concentrated sulphuric acid oxidizes copper and produces sulphur dioxide gas. Yes

7 Unit 20Oxidation and reduction Activity 20.4 Investigating the action of dilute and concentrated sulphuric acids on metals (S)/(T) 11d)If your answer to (c) is yes, name the gas and explain your answer. _______________________________________________________________ e) Does concentrated sulphuric acid act as a typical acid or an oxidizing agent in the reactions? _______________________________________________________________ Sulphur dioxide; concentrated sulphuric acid oxidizes zinc and produces sulphur dioxide gas. Concentrated sulphuric acid acts as an oxidizing agent.

8 Unit 20Oxidation and reduction Activity 20.4 Investigating the action of dilute and concentrated sulphuric acids on metals (S)/(T) Conclusion 12Dilute sulphuric acid acts as ( a typical acid / an oxidizing agent ) when reacting with metals. 13Concentrated sulphuric acid acts as ( a typical acid / an oxidizing agent ) when reacting with metals. It is itself changed to ____________________. sulphur dioxide

9 Unit 20Oxidation and reduction Activity 20.4 Investigating the action of dilute and concentrated sulphuric acids on metals (S)/(T) Question 14Write a chemical equation for each of the following reactions.


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