Igcse Model Questions Vol1 2025 Chemistry Question 15

Practice objective / multiple choice question 15 from the 2025 Igcse Model Questions Vol1 Chemistry examination.

Igcse Model Questions Vol1 2025 Chemistry Objective / Multiple Choice Medium Difficulty
Question 15 IGCSE_MODEL_QUESTIONS_VOL1 • 2025 • CHEMISTRY • objective

The solubility product of AgCl at 25 °C is \(K_{sp}=1.8\times10^{-10}\). The enthalpy change for its dissolution is \(\Delta H^{\circ}=+71\) kJ mol(^{-1}). (a) Using the van't Hoff equation, calculate \(K_{sp}\) at 35 °C. (b) A solution is prepared by dissolving AgNO₃ to give an initial \([\mathrm{Ag}^+] = 0.010\) M. After adding NaCl until the solution becomes saturated at 35 °C, determine the equilibrium concentration of \([\mathrm{Cl}^-]\). Give your answers in scientific notation to two significant figures.

Answer Options

A. (a) 4.6×10⁻⁹; (b) 4.6×10⁻⁷ M
B. (a) 5.2×10⁻¹⁰; (b) 5.2×10⁻⁸ M
Correct Answer C. (a) 4.6×10⁻¹⁰; (b) 4.6×10⁻⁸ M
D. (a) 2.3×10⁻¹⁰; (b) 2.3×10⁻⁸ M
Correct Answer
C
Correct Option:
(a) 4.6×10⁻¹⁰; (b) 4.6×10⁻⁸ M

About This Question

This is Igcse Model Questions Vol1 2025 Chemistry Question 15. It is one of the objective questions from the 2025 Igcse Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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