Pieces of zinc react with dilute hydrochloric acid to produce zinc chloride and hydrogen gas - Edexcel - GCSE Chemistry - Question 1 - 2017 - Paper 1
Question 1
Pieces of zinc react with dilute hydrochloric acid to produce zinc chloride and hydrogen gas.
(i) State what you would see when zinc is added to dilute hydrochloric... show full transcript
Worked Solution & Example Answer:Pieces of zinc react with dilute hydrochloric acid to produce zinc chloride and hydrogen gas - Edexcel - GCSE Chemistry - Question 1 - 2017 - Paper 1
Step 1
State what you would see when zinc is added to dilute hydrochloric acid.
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Answer
When zinc is added to dilute hydrochloric acid, you would observe bubbles forming as hydrogen gas is released. The solution may also appear cloudy as the zinc dissolves.
Step 2
Write the word equation for this reaction.
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Describe a test to show that this reaction is exothermic.
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Answer
To test if the reaction is exothermic, measure the temperature of the hydrochloric acid before adding zinc. After the zinc has reacted, measure the temperature again. If the temperature increases, it indicates that the reaction is exothermic.
Step 4
State what can be done to the pieces of zinc to make the reaction with the dilute hydrochloric acid faster.
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To speed up the reaction, you can decrease the size of the pieces of zinc by using a powder or increase the surface area through methods such as crushing.
Step 5
State the effect of adding a catalyst on the rate of a reaction.
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Adding a catalyst increases or speeds up the rate of a reaction without being consumed in the process.
