A few students from my weekly chemistry sec 4 classes have been asking me about the following Multiple Choice Questions (MCQ) on Electrolysis, more specifically on Electrolytic Cell.
It seemed like many secondary schools in Singapore had set this question in the recent school’s O Levels Preliminary Exams.
Question:
In an? electrolysis experiment, the same quantity of electricity deposited 16g of copper and 6g of titanium.
What was the charge on the titanium ion?
A. 1+
B. 2+
C. 3+
D. 4+
What do you think?
Clue: Although this is question is on Electrolysis, you need to realise that it is calculation-based and you should be thinking of Mole Calculations at the same time.
Work it out on your own, before you click the link below to check the answer and my suggested solution (with thought process).
[Read more…] about O Level Chemistry: Challenging Mole Calculation and Electrolysis Questions