Question
Which of the following salts when dissolved in water will get hydrolysed to form an acidic solution?
Answer: Option B
:
B
A salt formed from either weak acid or a weak base will get hydrolysed. Salts like NaCl,KCl andCaCl2 are formed from strong acid(HCl) & strong bases like NaOH and KOH respectively. Such salts formed from the reaction of strong bases and strong acids doesn't get hydrolysed.
NH4Cl is formed from a weak base and a strong acid and therefore is an acidic salt.
NH4Cl is hydrolysed in water to give [H+].
NH4Cl + H2O ⇔NH4OH + HCl
HCl→H++Cl−
Here, HCl is the strong acid formed and NH4OH is the weak base obtained.
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:
B
A salt formed from either weak acid or a weak base will get hydrolysed. Salts like NaCl,KCl andCaCl2 are formed from strong acid(HCl) & strong bases like NaOH and KOH respectively. Such salts formed from the reaction of strong bases and strong acids doesn't get hydrolysed.
NH4Cl is formed from a weak base and a strong acid and therefore is an acidic salt.
NH4Cl is hydrolysed in water to give [H+].
NH4Cl + H2O ⇔NH4OH + HCl
HCl→H++Cl−
Here, HCl is the strong acid formed and NH4OH is the weak base obtained.
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