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5 g sample contain only Na(2)CO(3) and N...

5 g sample contain only `Na_(2)CO_(3)` and `Na_(2)SO_(4)` . This sample is dissolved and the volume made up to 250 mL. 25 mL of this solution neutralizes 20 mL of 0.1 M `H_(2)SO_(4)`.
Calcalute the % of `Na_(2)SO_(4)` in the sample .

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5g sample contain only Na_2CO_3 and Na_2SO_4 . This sample is dissolved and the volume made up to 250mL. 25mL of this solution neutralizes 20mL of 0.1M H_2SO_4 . Calculate the percent of Na_2SO_4 in the sample.

4.0 g of NaOH and 4.9 g of H_(2)SO_(4) are dissolved in water and volume is made upto 250 mL. The pH of this solution is:

4.0 g of NaOH and 4.9 g of H_(2)SO_(4) are dissolved in water and volume is made upto 250 mL. The pH of this solution is:

4.0 g of NaOH and 4.9 g of H_(2)SO_(4) are dissolved in water and volume is made upto 250 mL. The pH of this solution is: