Waec Model Questions Vol1 2024 Chemistry Question 36

Practice objective / multiple choice question 36 from the 2024 Waec Model Questions Vol1 Chemistry examination.

Waec Model Questions Vol1 2024 Chemistry Objective / Multiple Choice Medium Difficulty
Question 36 WAEC_MODEL_QUESTIONS_VOL1 • 2024 • CHEMISTRY • objective

Calcium fluoride (CaF₂) has a solubility product Ksp = 1.5×10⁻¹⁰ at 25 °C. In a solution that already contains 0.010 M NaF, determine the molar solubility of CaF₂ at 25 °C. If the temperature is raised to 35 °C and Ksp becomes 3.0×10⁻¹⁰ (the NaF concentration remains unchanged), what is the new solubility?

Answer Options

A. 1.5×10⁻⁶ M at 25 °C; 1.5×10⁻⁶ M at 35 °C
B. 7.5×10⁻⁷ M at 25 °C; 1.5×10⁻⁶ M at 35 °C
Correct Answer C. 1.5×10⁻⁶ M at 25 °C; 3.0×10⁻⁶ M at 35 °C
D. 2.0×10⁻⁶ M at 25 °C; 4.0×10⁻⁶ M at 35 °C
Correct Answer
C
Correct Option:
1.5×10⁻⁶ M at 25 °C; 3.0×10⁻⁶ M at 35 °C

About This Question

This is Waec Model Questions Vol1 2024 Chemistry Question 36. It is one of the objective questions from the 2024 Waec Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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