Hydrochloric acid can be electrolysed using this apparatus - Edexcel - GCSE Chemistry - Question 1 - 2012 - Paper 1
Question 1
Hydrochloric acid can be electrolysed using this apparatus.
(i) State the form of energy used to carry out the electrolysis.
(ii) What gas is produced at the anode... show full transcript
Worked Solution & Example Answer:Hydrochloric acid can be electrolysed using this apparatus - Edexcel - GCSE Chemistry - Question 1 - 2012 - Paper 1
Step 1
State the form of energy used to carry out the electrolysis.
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Answer
The form of energy used for electrolysis is electrical energy, also referred to as direct current.
Step 2
What gas is produced at the anode?
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Answer
The gas produced at the anode during the electrolysis of hydrochloric acid is hydrogen (H₂).
Step 3
Describe what happens to damp blue or red litmus paper when chlorine is produced.
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Answer
When chlorine gas is produced, damp blue litmus paper turns red, and damp red litmus paper gets bleached white.
