Para-aminobenzoic acid (paba), p-h2nc6h4(cooh), is used in some sunscreens and hair conditioning products. Calculate the ph of a
1 answer:
the pH of an aqueous solution with [paba] = 0. 030 m and ka = 2. 2 × 10⁻⁵
<h3>What is pH ?</h3>pH is a measure of how acidic/basic water is.
The range goes from 0 - 14, with 7 being neutral.
pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base.
pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water.
H₂NC₆H₄COOH ----> H₂NC₆H₄COO⁻ + H⁺
0.030M 0 0
0.030-x x x
= x² / 0.030-x
x = 8.01 * 10⁻⁴
[H⁺] = x = 8.01 * 10⁻⁴
pH = -log[ H⁺]
=-log[ 8.01 * 10⁻⁴]
pH = 3.09
Therefore the pH of an aqueous solution with [paba] = 0. 030 m and ka = 2. 2 × 10⁻⁵
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Explanation:
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