Neco 2021 Chemistry Question 7

Practice essay / theory question 7 from the 2021 Neco Chemistry examination. This question covers Acids Bases and Salts .

Neco 2021 Chemistry Essay / Theory

Topic: Acids Bases and Salts

Question 7 NECO • 2021 • CHEMISTRY • essay

A student prepares 50.0 mL of 0.10 M acetic acid (CH₃COOH, Ka = 1.8×10⁻⁵ at 25 °C) in a beaker. She then titrates the solution with 0.10 M NaOH and records that after adding 5.0 mL of the base the solution becomes a buffer.

Question Parts

( a )

Calculate the pH of the solution after the addition of 5.0 mL of NaOH.

( b )

Write the net ionic equation for the reaction that occurs at the equivalence point and identify the salt formed. State whether the salt solution will be acidic, basic or neutral and justify your answer.

( c )

Calculate the pH of a 0.20 M aqueous solution of sodium acetate at 25 °C. (Use Kw = 1.0×10⁻¹⁴).

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About This Question

This is Neco 2021 Chemistry Question 7. It is one of the essay questions from the 2021 Neco Chemistry examination.

The question covers Acids Bases and Salts .

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