The Equivalent Masses Of Na2CO3 when It Is Titrated With HCl Using Phenolphthalein And Methyl Orange Indicators In Separate Experiments Are

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Question

The equivalent masses of Na2CO3 when it is titrated with HCl using phenolphthalein and methyl orange indicators in separate experiments are

Solution

Correct option is

106 and 53

 

For phenolphthalein used as indicator

Eq. mass of Na2CO3 = molar mass = 106

Purple colour disappears at this stage of reaction during titration.

For methyl orange used as indicator :  

Eq. mass = molar mass/2 = 106 /2 = 53

Red colour appears at the completion of above reaction.

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