What are the strengths of conjugate bases of a strong acid and a weak acid ?
Answers
Answer:
1) Strong acid dissociate completely in water , the resulting base formed would be very weak .
2) Because it has less tendency to gain proton i.e strong acids having very weak conjugate base .
Example :- HCl4 ==> ClO4^- + H^+
HCl4 is a strong acid and its conjugate base ClO4^- has less tendency to gain proton. Hence it is a weak conjugate base .
3) Weak acid dissociate completely incompletely in water , the resulting base formed would be very strong.
4) Because it has more tendency to gain proton i.e weak acids have strong conjugate base .
Example :- CH3COOH <==> CHCOO^- + H^+
CH3COOH is a weak acid and its conjugate base CH3COO^- has more tendency to gain proton. Hence it is a strong conjugate base .
If an acid is strong , it's conjugate base will be weak .
HCl is a stronger acid than the H3O+ ion implies that the Cl- ion is a weaker base for the reaction between HCl and water can be written as follows .
if an acid is weak , it's conjugate base will be strong .
A weak acid will have a low concentration of H+ .