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A solution has pH 13. After adding water, its pH becomes 11. What is the correct conclusion?

Answer and explanation

Correct answer: It became less basic but is still basic

The pH scale identifies solutions with pH above 7 as basic. Both 13 and 11 are above 7, so the solution remains basic after dilution. Adding water lowers the concentration of hydroxide ions and reduces alkalinity, causing the pH to move toward 7. It does not make the solution acidic or exactly neutral, and hydroxide concentration does not increase. Therefore option A is correct.

Related tags

PhDilutionBasic SolutionAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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