What is the main purpose of adding dilute sulfuric acid during the electrolysis of water?
Answer and explanation
Correct answer: To increase electrical conductivity
Pure water contains very few ions, so it is a poor conductor of electricity. Dilute sulfuric acid supplies ions, increasing the electrical conductivity of the solution and allowing current to pass more readily. The acid does not replace the external electrical source. During electrolysis, hydrogen is formed at the cathode and oxygen at the anode, with a volume ratio of 2:1, not 1:1.
Frequently asked questions
What is the correct answer to this question?
To increase electrical conductivity
Why is this the correct answer?
Pure water contains very few ions, so it is a poor conductor of electricity. Dilute sulfuric acid supplies ions, increasing the electrical conductivity of the solution and allowing current to pass more readily. The acid does not replace the external electrical source. During electrolysis, hydrogen is formed at the cathode and oxygen at the anode, with a volume ratio of 2:1, not 1:1.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
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