Neco Model Questions Vol1 2025 Chemistry Question 45

Practice objective / multiple choice question 45 from the 2025 Neco Model Questions Vol1 Chemistry examination.

Neco Model Questions Vol1 2025 Chemistry Objective / Multiple Choice Medium Difficulty

Question 45 NECO_MODEL_QUESTIONS_VOL1 • 2025 • CHEMISTRY • objective

The solubility product of calcium fluoride is \(K_{sp}=1.5 \times 10^{-10}\). Calculate the molar solubility of CaF₂ in a solution that already contains 0.10 M NaF. Then determine the mass of CaF₂ (M = 78.07 g mol\(^{-1}\)) that can be precipitated from 250 mL of this solution.

Answer Options

A. 1.0e-8 M and 1.8e-7 g

B. 3.0e-8 M and 5.0e-7 g

C. 2.5e-8 M and 4.1e-7 g

Correct Answer D. 1.5e-8 M and 2.9e-7 g

Correct Answer

Correct Option:

1.5e-8 M and 2.9e-7 g

About This Question

This is Neco Model Questions Vol1 2025 Chemistry Question 45. It is one of the objective questions from the 2025 Neco Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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Neco Model Questions Vol1 2025 Chemistry Question 45

The solubility product of calcium fluoride is \(K_{sp}=1.5 \times 10^{-10}\). Calculate the molar solubility of CaF₂ in a solution that already contains 0.10 M NaF. Then determine the mass of CaF₂ (M = 78.07 g mol\(^{-1}\)) that can be precipitated from 250 mL of this solution.

Answer Options

About This Question

Master the Exam!

The solubility product of calcium fluoride is \(K_{sp}=1.5 \times 10^{-10}\). Calculate the molar solubility of CaF₂ in a solution that already contains 0.10 M NaF. Then determine the mass of CaF₂ (M = 78.07 g mol\(^{-1}\)) that can be precipitated from 250 mL of this solution.