Question

The pH values of four solution A, B C, and D as determined by a student are 3, 7, 12 and 8 respectively. 

(i) Identify the most acidic and most basic solutions. 

(ii) Arrange the above four solutions in the decreasing order of their hydrogen ion concentration.

Answer 1

(i) Solution having pH 3, i.e., A is the most acidic. 

Solution having pH 12, i.e., C is the most acidic. 

(ii) pH in decreasing order of hydrogen ion concentration: A < B < D < C.