Why would it be wrong to call a solution with pH 8 neutral?
Answer and explanation
Correct answer: Because a solution with pH above 7 is basic
At about 25°C, a neutral aqueous solution has pH 7 because hydrogen-ion and hydroxide-ion concentrations are equal. A pH value above 7 indicates that hydroxide ions predominate relative to hydrogen ions, so the solution is basic. A solution of pH 8 is therefore only mildly alkaline, not neutral. Option A states this rule correctly; pH 8 is not a strong acid, and neutral pH is not 14.
Frequently asked questions
What is the correct answer to this question?
Because a solution with pH above 7 is basic
Why is this the correct answer?
At about 25°C, a neutral aqueous solution has pH 7 because hydrogen-ion and hydroxide-ion concentrations are equal. A pH value above 7 indicates that hydroxide ions predominate relative to hydrogen ions, so the solution is basic. A solution of pH 8 is therefore only mildly alkaline, not neutral. Option A states this rule correctly; pH 8 is not a strong acid, and neutral pH is not 14.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
