Which term describes a compound that dissolves in water to form a solution with a pH greater than 7?

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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

Which term describes a compound that dissolves in water to form a solution with a pH greater than 7?

Explanation:
The main idea is how pH indicates acidity or basicity. A solution with pH above 7 is basic, meaning it has higher OH− concentration. The term that describes the compound itself is base, because bases are substances that dissolve in water and produce a basic solution (increase OH− or accept H+). While “alkaline” describes the solution’s nature, the question asks for the compound term, so base is the best fit. For comparison, acids give pH below 7, and neutral substances give pH around 7.

The main idea is how pH indicates acidity or basicity. A solution with pH above 7 is basic, meaning it has higher OH− concentration. The term that describes the compound itself is base, because bases are substances that dissolve in water and produce a basic solution (increase OH− or accept H+). While “alkaline” describes the solution’s nature, the question asks for the compound term, so base is the best fit. For comparison, acids give pH below 7, and neutral substances give pH around 7.

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