Neco 2025 Chemistry Question 16

Practice objective / multiple choice question 16 from the 2025 Neco Chemistry examination.

Neco 2025 Chemistry Objective / Multiple Choice Medium Difficulty
Question 16 NECO • 2025 • CHEMISTRY • objective

A 25.0 g sample of a hydrated copper(II) sulfate is heated until constant mass and yields 15.0 g of anhydrous \(\mathrm{CuSO_4}\). Determine (i) the number of water molecules \(x\) in the formula \(\mathrm{CuSO_4\cdot xH_2O}\) and (ii) the percentage by mass of water in the hydrate.

Answer Options

A. x = 7; % water = 46%
B. x = 5; % water = 33%
C. x = 8; % water = 50%
Correct Answer D. x = 6; % water = 40%
Correct Answer
D
Correct Option:
x = 6; % water = 40%

About This Question

This is Neco 2025 Chemistry Question 16. It is one of the objective questions from the 2025 Neco Chemistry examination.

Difficulty level: Medium .

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