Question

Estheticians may not use buffered concentrations of alpha-hydroxy acids of 10 to 30 percent where pH is less than

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Answer 1

Estheticians may not use buffered concentrations of alpha-hydroxy acids of 10 to 30 percent where pH is less than 4.75.

Step-by-step explanation:

The pH scale ranges from 0 to 14, with values below 7 considered acidic and values above 7 considered alkaline.

In this case, the question asks for the pH where estheticians may not use buffered concentrations of alpha-hydroxy acids of 10 to 30 percent.

As the pH of the buffer must be between the pKa (3.75) and pKa + 1 (4.75), any pH less than 4.75 would be unsuitable for the use of alpha-hydroxy acids.