Published by:
CGP EDU Academic Team
Published on: August 13, 2026
In the mixture of (Na 2 CO 3 + NaHCO 3 ) volume of HC1 required is x mL with phenolphthalein indicator and y mL with methyl orange indicator in the same titration. Hence volume of HC1 for complete reaction of Na 2 CO 3 is:
A
2x
B
y
C
D
(y-x)
Text Solution
Verified by ExpertsThe correct answer is:
A
If x mL is with phenolphthalein the rxn occurring is
Na 2 CO 3 + HC1 
NaHCO 3 + NaCl
So the volume of HCI for complete reaction of Na 2 CO 3 would be double of ' x ' because the reaction will be
Na 2 CO 3 + 2HC1 
Na 2 CO 3 + 2NaCl
So, 2x
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