National League for Nursing (NLN PAX) Practice Exam

Question: 1 / 495

What is the pH of a solution whose H+ ion concentration is 1 x 10-2 mole per liter?

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To determine the pH of a solution based on the hydrogen ion concentration, you can use the formula:

pH = -log[H+]

In this case, the hydrogen ion concentration is 1 x 10^(-2) moles per liter. Applying the formula:

pH = -log(1 x 10^(-2))

Calculating the logarithm, you find:

pH = -(-2) = 2

This means that when the concentration of H+ ions is 0.01 moles per liter, the resulting pH of the solution is 2, indicating that it is an acidic solution. This aligns with the provided answer.

On the other hand, concentrations leading to pH values like 1 or values above 7, such as 12 and 13, would correspond to either a much higher concentration of hydrogen ions (stronger acids) or lower concentrations (alkaline solutions), which do not match the given concentration of 1 x 10^(-2) moles per liter.

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