Question

which pair will show common ion effect?
1 bacl2+ ba(no3)2
2 nacl + hcl
3 nh4oh + nh4cl
4 nacn + kcn​

Answer 1

Correct option is 3) NH4OH+NH4Cl✔✔

E̳x̳p̳l̳a̳n̳a̳t̳i̳o̳n̳:̳To the weak base, NH4OH, if  NH4Cl is added which provides the common NH4+ ions, dissociation of NH4OH is suppressed.

NH4OH ⇔NH4+  + OH-

NH4Cl⇔NH4+  + Cl-

нσρє тнιѕ ωιℓℓ нєℓρ уσυ ✿◕‿◕✿

Answer 2

Answer:c

Explanation:

Common ion effect is shown when weak electrolyte and strong electrolyte is mixed . Strong electrolyte has the ion which is common in weak electrolyte and thus option is 3 as all other options has strong electrolyte only .

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