Gce Model Questions Vol1 2018 Chemistry Question 46

Practice objective / multiple choice question 46 from the 2018 Gce Model Questions Vol1 Chemistry examination.

Gce Model Questions Vol1 2018 Chemistry Objective / Multiple Choice Medium Difficulty

Question 46 GCE_MODEL_QUESTIONS_VOL1 • 2018 • CHEMISTRY • objective

Solid CuSO₄ is added in excess to a solution that contains 0.20 M NH₃. The solubility product of CuSO₄ is \(K_{sp}=1.2\times10^{-5}\) and the overall formation constant for the tetraamminecopper(II) ion is \(\beta_{4}=1.1\times10^{13}\). Assuming the concentration of NH₃ remains essentially unchanged, calculate the equilibrium concentration of free \(\text{Cu}^{2+}\) ions in the solution.

Answer Options

A. 3.2\times10^{-8}\ \text{M}

B. 1.3\times10^{-7}\ \text{M}

C. 5.0\times10^{-9}\ \text{M}

Correct Answer D. 2.6\times10^{-8}\ \text{M}

Correct Answer

Correct Option:

2.6\times10^{-8}\ \text{M}

About This Question

This is Gce Model Questions Vol1 2018 Chemistry Question 46. It is one of the objective questions from the 2018 Gce Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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