During the titration of a mixture of Na2CO3 and NaHCO3 against HCI

Phenolphthalein is used to get first end point. only Na2CO3 reacts with Hcl to form NaHCO3 upto first end pointNa2CO3 +HCl → NaHCO3 +NaClPhenolphthalein cannot be used for NaHCO3 titration

During the titration of a mixture of Na2CO3 and NaHCO3 against HCI

Phenolphthalein is used to get first end point. only Na2CO3 reacts with Hcl to form NaHCO3 upto first end pointNa2CO3 +HCl → NaHCO3 +NaClPhenolphthalein cannot be used for NaHCO3 titration

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During the titration of a mixture of Na₂CO₃ and NaHCO₃ against HCI

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Phenophthalein is used to detect the first end point

Phenophthalein is used to detect the second end point

Methyl orange is used to detect the first end point

Methyl red is used to detect the first end point

answer is C.

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Detailed Solution

Phenolphthalein is used to get first end point. only Na₂CO₃ reacts with Hcl to form NaHCO₃ upto first end point
Na₂CO₃ +HCl → NaHCO₃ +NaCl
Phenolphthalein cannot be used for NaHCO₃ titration

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