why would the basic strength of NH4OH decrease on addition of NH4Cl ? 

Asked by astutijoshi | 15th Sep, 2019, 03:09: PM

Expert Answer:

NH4OH is a weak base it does not ionizes completely, while NH4Cl is a strong electrolyte, It decomposes completely. Due to the presence of NH4+  in NH4Cl, It suppresses the ionisation of weak base NH4OH to decrease the OH- ion concentration so that higher group cations will not get precipitated. So basic strength of NH4OH decreases. This effect is known as the common ion effect.

Answered by Ravi | 16th Sep, 2019, 12:20: PM