Neco 2018 Chemistry Question 25

Practice objective / multiple choice question 25 from the 2018 Neco Chemistry examination.

Neco 2018 Chemistry Objective / Multiple Choice Medium Difficulty
Question 25 NECO • 2018 • CHEMISTRY • objective

A solution is made by dissolving \(0.50\) g of sodium chloride (\(\mathrm{NaCl}\)) in \(250.0\) mL of water. Excess solid silver nitrate (\(\mathrm{AgNO_3}\)) is then added until the solution becomes saturated with respect to silver chloride. At \(25^{\circ}\mathrm{C}\) the solubility product of silver chloride is \(K_{sp}=1.8 \times 10^{-10}\). (a) Calculate the equilibrium concentration of \(\mathrm{Ag^{+}}\) ions in the solution. (b) Determine the mass of silver chloride precipitated.

Answer Options

A. [Ag+] = 5.3×10⁻⁹ M; mass AgCl = 0.62 g
B. [Ag+] = 2.1×10⁻⁸ M; mass AgCl = 0.62 g
Correct Answer C. [Ag+] = 5.3×10⁻⁹ M; mass AgCl = 1.23 g
D. [Ag+] = 1.0×10⁻⁸ M; mass AgCl = 1.23 g
Correct Answer
C
Correct Option:
[Ag+] = 5.3×10⁻⁹ M; mass AgCl = 1.23 g

About This Question

This is Neco 2018 Chemistry Question 25. It is one of the objective questions from the 2018 Neco Chemistry examination.

Difficulty level: Medium .

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