40 ml of 0.05 M solution of sodium sesquicarbonate (Na2CO3.NaHCO3.2 H2O ) is titrated against 0.05 M HCl. x ml of HCl is used when phenolphthalein is indicator and y ml of HCl is used when methyl orange is the indicator in two separate titrations. Hence (y ' x) is

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40 ml of 0.05 M solution of sodium sesquicarbonate (Na2CO3.NaHCO3.2 H2O ) is titrated against 0.05 M HCl. x ml of HCl is used when phenolphthalein is indicator and y ml of HCl is used when methyl orange is the indicator in two separate titrations. Hence (y ' x) is






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