Waec Model Questions Vol1 2018 Chemistry Question 47

Practice objective / multiple choice question 47 from the 2018 Waec Model Questions Vol1 Chemistry examination.

Waec Model Questions Vol1 2018 Chemistry Objective / Multiple Choice Medium Difficulty
Question 47 WAEC_MODEL_QUESTIONS_VOL1 • 2018 • CHEMISTRY • objective

A solution contains 0.10 M NaF and 0.05 M CaCl₂. The solubility product of CaF₂ at 25 °C is 3.9 × 10⁻¹¹. Determine whether a precipitate forms, and if it does, calculate the equilibrium concentration of Ca²⁺ ions (in mol L⁻¹).

Answer Options

A. 2.0×10⁻⁹ M
B. 7.8×10⁻⁹ M
Correct Answer C. 3.9×10⁻⁹ M
D. 1.2×10⁻⁸ M
Correct Answer
C
Correct Option:
3.9×10⁻⁹ M

About This Question

This is Waec Model Questions Vol1 2018 Chemistry Question 47. It is one of the objective questions from the 2018 Waec Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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