Published by:
CGP EDU Academic Team
Published on: August 14, 2026
If the pKa of lactic acid is 5, then the pH of 0.005 M calcium 1 act ate solution at 25° C is__________x 10 -1 (Nearest integer)
Lactic acid 
Text Solution
Verified by ExpertsThe correct answer is:
85
(85)
Concentration of calcium lactate = 0.005 M:
concentration of lactate ion = (2 x 0.005) M. Calcium lactate is a salt of weak acid + strong base
Salt hydrolysis will take place.
pH = 7 + 
(pKa + logC)
= 7 + 
(5 +log (2x0.005))
= 7 + 
[5-21og10] =7 + 
x 3=8.5=85x10 -1
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