Neco 2025 Chemistry Question 38

Practice objective / multiple choice question 38 from the 2025 Neco Chemistry examination.

Neco 2025 Chemistry Objective / Multiple Choice Medium Difficulty

Question 38 NECO • 2025 • CHEMISTRY • objective

The salt \(\text{AB}_2\) (molar mass \(150\ \text{g mol}^{-1}\)) is slightly soluble in water. Its solubility at \(25\ ^\circ\text{C}\) in pure water is \(0.012\ \text{g}\) per \(100\ \text{mL}\). When a \(0.10\ \text{M}\) solution of the cation \(\text{A}^{2+}\) is added, the solubility drops to \(0.0011\ \text{g}\) per \(100\ \text{mL}\). Assuming activity coefficients are unity, calculate the solubility product \(K_{sp}\) of \(\text{AB}_2\).

A. 2.0\times10^{-8}

B. 1.5\times10^{-8}

C. 3.0\times10^{-9}

Correct Answer D. 2.0\times10^{-9}

Correct Answer

Correct Option:

2.0\times10^{-9}

This is Neco 2025 Chemistry Question 38. It is one of the objective questions from the 2025 Neco Chemistry examination.

Difficulty level: Medium .

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