Chapter 2: Problem 20

What is true of a solution that goes from pH 5 to \(\mathrm{pH} 8 ?\) a. The \(\mathrm{H}^{+}\) concentration decreases as the solution becomes more basic. b. The \(\mathrm{H}^{+}\) concentration increases as the solution becomes more acidic. c. The \(\mathrm{H}^{+}\) concentration decreases as the solution becomes more acidic.

Short Answer

Expert verified

The correct statement for a solution that goes from pH 5 to pH 8 is: a. The H+ concentration decreases as the solution becomes more basic.

Step by step solution

Understand the relationship between pH and H+ concentration

Recall that the pH of a solution is a measure of its acidity or alkalinity. Mathematically, it's represented by the following equation: \[ \mathrm{pH} = -\log{[\mathrm{H}^+]} \] where \( [\mathrm{H}^+] \) is the concentration of H+ ions in the solution. When the pH of a solution increases, its H+ concentration decreases, and the solution becomes less acidic (or more basic). Conversely, when the pH of a solution decreases, its H+ concentration increases, and the solution becomes more acidic (or less basic).

Analyze the statements given

Let's evaluate each statement in the light of the relationship between pH and H+ concentration: a. The H+ concentration decreases as the solution becomes more basic. b. The H+ concentration increases as the solution becomes more acidic. c. The H+ concentration decreases as the solution becomes more acidic.

Determine the True Statement

We are given that the pH increases from 5 to 8. This means that the solution becomes more basic. Based on the relationship between pH and H+ concentration, when the solution becomes more basic, the concentration of H+ ions decreases. This matches with statement (a): a. The H+ concentration decreases as the solution becomes more basic. The correct statement that is true for a solution that goes from pH 5 to pH 8 is: a. The H+ concentration decreases as the solution becomes more basic.

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Short Answer

Step by step solution

Understand the relationship between pH and H+ concentration

Analyze the statements given

Determine the True Statement

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