Question

Consider the following data on some weak acids and weak bases: acid name hypochlorous acid nitrous acid formula HCIO 3.0 x 108 HNO2 4.5 x 10-4 base Kb name formula ammonia NH; 1.8 x 10-5 hydroxylamine HONH2 1.1 10- Use this data to rank the following solutions in order of increasing pH. In other words, select a 'l' next to the solution that will have the lowest pH, a '2' next to the solution that will have the next lowest pH, and so on. pH solution 0.1 M HONH3CI 0.1 M Nacio 0.1 M NH4Br choose one ? choose one choose one choose one 5 ? 0.1 M KNO2 x

Answer 1

Answer

Solution	pH
0.1M HONH3Cl	1
0.1M NaClO	4
0.1M NH4Br	2
0.1M KNO2	3

Explanation

i) HONH3Cl and NH4Br are salts of weak base and strong acid, so their solutions are acidic . HONH2 is weaker base than NH3 , so solution of HONH3Cl would be more acidic.

ii) KClO and KNO2 are salts of weak acid and strong base , so their solutions are acidic. HClO is weaker acid 5han HNO2, so solution of KClO would be more basic.