In the mixture of (N a _ 2 C O _ 3 + NaHC O _ 3 ) volume of HCl required is xmL with phenolphthalein indicator and ymL with methyl orange indicator in the same titration. Hence volume of HCl for complete reaction of Na

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Correct answer: A. 2x

If xmL is with phenolphthalein the rxn occurring is N a _ 2 C O _ 3 + HCl → NaHC O _ 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 N a _ 2 C O _ 3 + 2HCl → N a _ 2 C O _ 3 + 2NaCl So, 2x

In the mixture of (N a _ 2 C O _ 3 + NaHC O _ 3 ) volume of HCl...

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