Neco 2022 Chemistry Question 7

Practice essay / theory question 7 from the 2022 Neco Chemistry examination. This question covers Acids, Bases and Salts .

Neco 2022 Chemistry Essay / Theory

Topic: Acids, Bases and Salts

Question 7 NECO • 2022 • CHEMISTRY • essay

A 1.00 L solution is prepared by mixing 0.20 mol of acetic acid (CH₃COOH) with 0.30 mol of sodium acetate (CH₃COONa). The temperature of the solution is 25 °C and the acid dissociation constant of acetic acid is K_a = 1.74×10⁻⁵.

( a )

Define a buffer solution and give one practical example of a buffer system used in industry.

( b )

Derive the Henderson–Hasselbalch equation for the above buffer system starting from the expression of the acid dissociation constant.

( c )

Calculate the pH of the prepared buffer solution.

( d )

If 0.010 mol of a strong acid (HCl) is added to the 1.00 L buffer, calculate the new pH of the solution.

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This is Neco 2022 Chemistry Question 7. It is one of the essay questions from the 2022 Neco Chemistry examination.

The question covers Acids, Bases and Salts .

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