Question
A solution was tested with a pH sensor and the reading was found to be 9. Is it a solution of an acid or an alkali? cllsell
Answer
4.2
(307 Votes)
Clarice
Elite · Tutor for 8 years
Answer
Alkali
Explanation
## Step1:Just like our example problem, we first remember that pH scale is a logarithmic scale used to specify the acidity or basicity or alkalinity of an aqueous solution. It is technically a measure of the hydrogen ion concentration.## Step2:We recall that on the pH scale, 7 is noted as a neutral point. Anything lesser than 7 is categorised as an acid while anything higher than 7 is classified as alkaline or basic.## Step3:The given problem informs us that the tested solution has a pH reading of 9. Which means, the pH is greater than 7. Thus, following the classification dictates of the pH scale, our solution could be classified as an alkali or a basic solution.