Waec Model Questions Vol1 2021 Chemistry Question 1

Practice objective / multiple choice question 1 from the 2021 Waec Model Questions Vol1 Chemistry examination.

Waec Model Questions Vol1 2021 Chemistry Objective / Multiple Choice Medium Difficulty

Question 1 WAEC_MODEL_QUESTIONS_VOL1 • 2021 • CHEMISTRY • objective

A 0.250 g sample of the salt AB₂ (molar mass 150 g·mol⁻¹) is added to 250.0 mL of water at 25 °C. The solution becomes saturated and some solid remains. The solubility product of AB₂ at this temperature is Kₛₚ = 1.6×10⁻⁹. Calculate the concentration of B⁻ ions in the saturated solution (in mol·L⁻¹).

Answer Options

Correct Answer A. 1.48×10⁻³ mol·L⁻¹

B. 1.48×10⁻⁴ mol·L⁻¹

C. 2.96×10⁻³ mol·L⁻¹

D. 7.40×10⁻⁴ mol·L⁻¹

Correct Answer

Correct Option:

1.48×10⁻³ mol·L⁻¹

About This Question

This is Waec Model Questions Vol1 2021 Chemistry Question 1. It is one of the objective questions from the 2021 Waec Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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