Neco 2020 Chemistry Question 1

Practice objective / multiple choice question 1 from the 2020 Neco Chemistry examination.

Neco 2020 Chemistry Objective / Multiple Choice Medium Difficulty
Question 1 NECO • 2020 • CHEMISTRY • objective

A solution contains 0.010 M NaCl and 0.010 M NaBr. Silver nitrate solution is added slowly. Using the solubility‑product constants \(K_{sp}(AgCl)=1.8\times10^{-10}\) and \(K_{sp}(AgBr)=5.0\times10^{-13}\), determine which silver halide will precipitate first and calculate the concentration of \(Ag^{+}\) at which precipitation of that salt begins.

Answer Options

Correct Answer A. AgBr precipitates first; precipitation begins at \([Ag^{+}]=5.0\times10^{-11}\,M
B. AgCl precipitates first; precipitation begins at \\([Ag^{+}]=1.8\\times10^{-9}\\,M
C. AgCl precipitates first; precipitation begins at \\([Ag^{+}]=5.0\\times10^{-11}\\,M
D. AgBr precipitates first; precipitation begins at \\([Ag^{+}]=2.5\\times10^{-11}\\,M
Correct Answer
A
Correct Option:
AgBr precipitates first; precipitation begins at \([Ag^{+}]=5.0\times10^{-11}\,M

About This Question

This is Neco 2020 Chemistry Question 1. It is one of the objective questions from the 2020 Neco Chemistry examination.

Difficulty level: Medium .

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