Question

Five solutions A,B,C,D and E when tested with universal indicator showed pH of 4, 1, 11, 7, and 9, respectively. Which solution is
(a) neutral?
(b) strongly alkaline?
(c) strongly acidic?
(d) weakly acidic?
(e) weakly alkaline?
Arrange the pH in increasing order of hydrogen-ion concentration.

Answer 1

Arrange the pH in increasing order of hydrogen-ion concentration.
(a) Neutral $\rightarrow$ Solution D with pH 7
(b) Strongly alkaline $\rightarrow$Solution C with pH 11
(c) Strongly acidic $\rightarrow$Solution B with pH 1
(d) Weakly acidic $\rightarrow$Solution A with pH 4
(e) Weakly alkaline $\rightarrow$Solution E with pH 9
The pH can be arranged in the increasing order of the concentration of hydrogen ions as 11 < 9 < 7 < 4 < 1