pH 9 corresponds to which type of solution?

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Study for the IGCSE Edexcel Chemistry Test. Access flashcards and multiple choice questions with hints and explanations. Get ready for your exam!

Multiple Choice

pH 9 corresponds to which type of solution?

Explanation:
pH tells you how acidic or basic a solution is. A pH above 7 means alkaline. At pH 9 there are far more hydroxide ions than hydrogen ions, so the solution is basic, but not extremely basic. The strength of a base depends on how completely it dissociates in water: strong bases fully dissociate and push the pH very high, while weak bases only partly dissociate and give a moderate pH like around 9. So pH 9 corresponds to a weak alkali. This isn’t a strong base or an acid, and it isn’t neutral.

pH tells you how acidic or basic a solution is. A pH above 7 means alkaline. At pH 9 there are far more hydroxide ions than hydrogen ions, so the solution is basic, but not extremely basic. The strength of a base depends on how completely it dissociates in water: strong bases fully dissociate and push the pH very high, while weak bases only partly dissociate and give a moderate pH like around 9. So pH 9 corresponds to a weak alkali. This isn’t a strong base or an acid, and it isn’t neutral.

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