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O Level Chemistry & IP Chemistry Notes by 10 Year Series Author – Chemistry Specialist

O Level Chemistry & IP Chemistry Notes by 10 Year Series Author - Chemistry Specialist

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Mole Concepts

O Level Chemistry: Challenging Mole Calculation and Electrolysis Questions

In the previous post, we have discussed on a MCQ question on Electrolysis that requires students to:

1. Write out discharge half equations

2. Do Molar Ratio Comparisons

Question:

Which of the following requires the least number of electrons for discharge?

A. 2 mol of Al3+ (aluminium) ions

B. 5 mole of OH– (hydroxides) ions

C. 3 mol of O2- (oxides) ions

D. 6 mol of H+ (hydrogen) ions

Write your Answer and Suggested Working in the “Leave A Reply” section below.

PS: If you are not sure how to proceed, you can refer to the previous blogpost by clicking HERE

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