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pH of a solution obtained by mixing equal volume of 0.2 M NaOH & 0.2 M CH3COOH
(Ka = 10–5) is :
(1) 7 (2) 5 (3) 9 (4) 9.5

VISHAL GUPTA , 8 Years ago
Grade
anser 1 Answers
Arun

Last Activity: 5 Years ago

Weak acid is mixed with strong base 
So the concentration of the salt CH​3COONa = 0.1 M 
pKa = - log 10-5 = 5
pH= 1/2[pKw - pKa -log C]
   = ​1/2[14 - 5 -log 0.1]
  = 1/2[10]
 = 5
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