(i) Five solutions A, B, C, D and E when tested with pH paper showed pH as 4, 1, 13, 7 and 10 respectively.…
(i) Five solutions A, B, C, D and E when tested with pH paper showed pH as 4, 1, 13, 7 and 10 respectively. Which solution is : (1) Strongly acidic (2) Strongly alkaline (3) Weakly acidic (4) Neutral and (5) Weakly alkaline ? Arrange the solutions in increasing order of H+ ion concentration.
(ii) Write the name and formula of (1) an acidic salt and (2) a basic salt giving the name of the parent acid and parent base used to form the salt in each case.
Solution
(a)(i)
(1) Solution B
(2) Solution C
(3) Solution A
(4) Solution D
(5) Solution E
Increasing Order of H+ ion concentration :– C < E < D < A < B
(ii) (1) Acidic salt : Ammonium chloride; NH4Cl
Parent Acid-Hydrochloric acid /HCl
Parent Base- Ammonium hydroxide/(NH4OH)
(2) Basic salt : Sodium Carbonate; Na2CO3
Parent Acid-Carbonic acid / H2CO3
Parent Base- Sodium hydroxide/ NaOH
(Or Any other)