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WAEC Chemistry 2025 Theory — Question 33

Question 33 of 70 from the West African Examinations Council (WAEC) Chemistry 2025 Theory paper, with the correct answer and a full explanation.

3(b)(ii). Write an equation for the reaction of: I. X with calcium oxide; II. Y with ammonium chloride.

Model answer

I. CaO + H2O -> Ca(OH)2. II. Ca(OH)2 + 2NH4Cl -> CaCl2 + 2NH3 + 2H2O.

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