Rates, equilibrium and pH

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Question 21

Lactic acid ( $CH3CH(OH)COOH\text{CH}_3\text{CH(OH)COOH}$ ) is a weak monoprotic acid found in sour milk and produced in muscles during anaerobic respiration. An aqueous solution of lactic acid has a concentration of 0.055 mol dm^-3.

At 298 K, the $pKa\text{p}K_{\text{a}}$ of lactic acid is 3.86.

What is the pH of this lactic acid solution at 298 K?

$1.26$

$2.56$

$5.12$

$1.30$

Rates, equilibrium and pH Questions

A Level
Chemistry
Rates, equilibrium and pH

A Level
Chemistry OCR A
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