Five solutions A, B, C, D and E when tested with universal indicator showed pH as 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.

Five solutions A, B, C, D and E when tested with universal indicator s

1.	Five solutions A, B, C, D and E when tested with universal indicator showed pH as 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» SOLUTION :A solution having pH equal to 7 is neutral. A solution with pH RANGE 0 - 7 is acidic while a solution with pH range 7 – 14 is basic. Smaller the value of pH in the range 0 – 7, stronger is the acid. Higher the value of pH in range 7 - 14, stronger is the base (alkali). Based on above, we can DECIDE the acidic or basic nature of A, B, C, D and E: The pH in increasing ORDER of hydrogen ion concentration are :