What is the pH of a neutral solution?

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Study for the Grade 9 Environmental Chemistry Test. Use a blend of multiple-choice questions and detailed explanations. Master key concepts and prepare effectively!

Multiple Choice

What is the pH of a neutral solution?

Explanation:
pH tells us how acidic or basic a solution is by looking at the hydrogen ion concentration. In pure water at room temperature, the hydrogen ions and hydroxide ions are equal, each at about 1×10^-7 moles per liter. The pH is the negative log of the hydrogen ion concentration, so -log10(1×10^-7) equals 7. That value of seven means the solution is neutral—neither acidic nor basic. If there are more hydrogen ions, the pH drops below seven (acidic); if there are fewer, the pH rises above seven (basic). The numbers shown in the other options correspond to conditions that are either strongly acidic or strongly basic, not neutral.

pH tells us how acidic or basic a solution is by looking at the hydrogen ion concentration. In pure water at room temperature, the hydrogen ions and hydroxide ions are equal, each at about 1×10^-7 moles per liter. The pH is the negative log of the hydrogen ion concentration, so -log10(1×10^-7) equals 7. That value of seven means the solution is neutral—neither acidic nor basic. If there are more hydrogen ions, the pH drops below seven (acidic); if there are fewer, the pH rises above seven (basic). The numbers shown in the other options correspond to conditions that are either strongly acidic or strongly basic, not neutral.

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