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CGP EDU Academic Team
Published on: August 13, 2026
The first and second dissociation constants of an acid H 2 A are 1.0 × 10 –5 and 5.0 × 10 –10 respectively. The overall dissociation constant of the acid will be
Text Solution
Verified by ExpertsThe correct answer is:
A
H 2 A 
H + + HA – ; K 1 = 
= 1 × 10 –5
HA – 
H + + A 2– ; K 2 = 5 × 10 –10 = 
K = 
= K 1 × K 2 = 1 × 10 –5 × 5 × 10 –15
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