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Question: Answered & Verified by Expert
In the mixture of Na2CO3+NaHCO3 volume of HCl required is x mL with phenolphthalein indicator and y mL with methyl orange indicator in the same titration. Hence volume of HCl for complete reaction of Na2CO3 is:
ChemistryRedox ReactionsJEE Main
Options:
  • A 2x
  • B y
  • C x2
  • D yx
Solution:
1520 Upvotes Verified Answer
The correct answer is: 2x
If x mL is with phenolphthalein the rxn occurring is
Na2CO3+HClNaHCO3+NaCl
So the volume of HCI for complete reaction of Na2CO3 would be double of ' x ' because the reaction will be
Na2CO3+2HClNa2CO3+2NaCl
So, 2x

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