Rates, equilibrium and pH

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Question 38

Glycolic acid ( $HOCH2COOH\text{HOCH}_2\text{COOH}$ ) is a weak monoprotic acid commonly used in dermatological chemical peels to improve skin texture. A student prepares a skincare formulation containing an aqueous solution of glycolic acid with a concentration of 0.045 mol dm^-3.

At 298 K, glycolic acid has a $pKa\text{p}K_{\text{a}}$ of 3.83.

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

$1.35$

$2.59$

$5.18$

$1.24$

Rates, equilibrium and pH Questions

A Level
Chemistry
Rates, equilibrium and pH

A Level
Chemistry OCR A
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