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SingaporeChemistryQuick questions
Electrolysis
Quick questions on Electrolysis of aqueous solutions: N(A)-Level Chemistry
5short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the rule at the cathode?Show answer
At the cathode (negative), the choice is between the metal and hydrogen (from water):
What is the rule at the anode?Show answer
At the anode (positive), the simple rule for N(A) level is:
What is q1?Show answer
State which gas forms at the cathode when dilute sodium chloride solution is electrolysed, and why. [2 marks]
What is q2?Show answer
Dilute copper(II) sulfate solution is electrolysed. State the products at the cathode and the anode. [2 marks]
What is q3?Show answer
Explain why electrolysing a salt solution can give different products from electrolysing the molten salt. [2 marks]
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