Video: Identifying the Best Description of a Solution with a pH of 8.0 in a Set of Descriptions

Which of the following best describes a solution with a pH of 8.0? [A] Strongly basic [B] Slightly basic, (C) neutral, (D) slightly acidic, or (E) strongly acidic

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Video Transcript

Which of the following best describes a solution with a pH of 8.0? (A) Strongly basic, (B) slightly basic, (C) neutral, (D) slightly acidic, or (E) strongly acidic.

pH is a way to measure the acidity or basicity of a solution. It is measured on a scale from zero to 14, where seven indicates neutral, neither acidic nor basic. Anything above seven, basic. And the higher the number, the higher the basicity. Anything below seven, acid or acidic. And the lower the number, the higher the acidity.

Some examples of everyday liquids and their pHs are shown. We can see that oven cleaner has a very high pH of about 13 and the acid in our stomachs a pH of about one, which is very acidic.

The formula for pH is shown. pH is equal to the negative log of the concentration of H3O+ ions in a solution. H3O+ is the hydronium ion. This equation describes an inverse relationship. Which means that when the pH is very high, the concentration of hydronium ions in solution is very low. And conversely, when the pH is very low, the concentration of hydronium ions in solution is very high.

The question asks, which of the following best describes a solution with a pH of 8.0? A pH of 8.0, which is the approximate pH of seawater, is just slightly more basic than a perfectly neutral solution or a perfectly neutral liquid such as pure water. So, finally, we can say that a solution with a pH of 8.0 is slightly basic.

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