Neco Model Questions Vol1 2021 Chemistry Question 1

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

Neco Model Questions Vol1 2021 Chemistry Objective / Multiple Choice Hard Difficulty

Question 1 NECO_MODEL_QUESTIONS_VOL1 • 2021 • CHEMISTRY • objective

A 0.10 M solution of oxalic acid (\(\mathrm{H_2C_2O_4}\)) is prepared in a 50.0 mL flask. Oxalic acid has \(K_{a1}=5.6\times10^{-2}\) and \(K_{a2}=6.2\times10^{-5}\). Exactly 0.0050 mol of NaOH is added to the solution. Calculate the pH of the resulting solution.

Answer Options

A. 3.05

Correct Answer B. 2.61

C. 2.14

D. 2.97

Correct Answer

Correct Option:

2.61

About This Question

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

Difficulty level: Hard .

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Neco Model Questions Vol1 2021 Chemistry Question 1

A 0.10 M solution of oxalic acid (\(\mathrm{H_2C_2O_4}\)) is prepared in a 50.0 mL flask. Oxalic acid has \(K_{a1}=5.6\times10^{-2}\) and \(K_{a2}=6.2\times10^{-5}\). Exactly 0.0050 mol of NaOH is added to the solution. Calculate the pH of the resulting solution.

Answer Options

About This Question

Master the Exam!

A 0.10 M solution of oxalic acid (\(\mathrm{H_2C_2O_4}\)) is prepared in a 50.0 mL flask. Oxalic acid has \(K_{a1}=5.6\times10^{-2}\) and \(K_{a2}=6.2\times10^{-5}\). Exactly 0.0050 mol of NaOH is added to the solution. Calculate the pH of the resulting solution.