MCAS Biology Practice Test 2026 – Complete Exam Preparation

Question: 1 / 400

What is the pH range of acids?

Above 7

Exactly 7

Below 7

Acids are defined by their ability to donate protons (H⁺ ions) in a solution, which results in a pH value that is less than 7. The pH scale ranges from 0 to 14, where a lower pH indicates more acidity. Consequently, substances with a pH less than 7 possess acidic characteristics. For example, hydrochloric acid (HCl) has a pH around 1, while citric acid generally has a pH ranging from 2 to 3. Thus, the correct understanding is that acids are characterized by their pH being below 7.

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Both above and below 7

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