Question
A solution was tested with a pH sensor and the reading was found to be 9. Is it o I solution of an acid or an alkali?
Answer
4.7
(238 Votes)
Ffion
Elite · Tutor for 8 years
Answer
It is a solution of an alkali.
Explanation
The pH scale ranges from 0 to 14 and is a measure of acidity or alkalinity of a solution. A pH reading below 7 signifies an acidic solution, a pH reading above 7 signifies an alkaline or base solution, and a pH of 7 signifies a neutral solution, neither acidic nor alkaline. Therefore, a solution with pH 9 is deemed to be a basic or alkaline solution because it falls above 7 on the pH scale.