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WAEC Chemistry 2015 Objective — Question 22

Question 22 of 50 from the West African Examinations Council (WAEC) Chemistry 2015 Objective paper, with the correct answer and a full explanation.

Consider the following equation: SO₄²⁻(aq)+2H⁺(aq)+ye⁻→SO₃²⁻(aq)+H₂O(l). The value of y in the equation is

A. 2Correct
B. 3
C. 4
D. 6

Explanation

Balancing charge on both sides: -2+2(1)+y(-1) = -2+0, giving -y = -2, so y = 2.

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