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

Difficulty level: Medium .

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