In the reaction of sodium thiosulphate with I_(2)in aqueous medium the equivalent weight of sodium thiosulphate is equal to

In the reaction of sodium thiosulphate with I_(2)in aqueous medium the

1.	In the reaction of sodium thiosulphate with I_(2)in aqueous medium the equivalent weight of sodium thiosulphate is equal to
Answer» Molar MASS of sodium thiosulphate The average of molar masses of `Na_(2)S_(2)O_(3)` and `I_(2)` Half the molar mass of sodium thiosulphate Molar mass of SODIU thiosulphate `xx 2` Solution :`2Na_(2)S_(2)O_(3)*5H_(2)O + I_(2) rarr 2NaI + Na_(2) S_(4) O_(6)` or `:.2S_(2)O_(3)^(3-) rarr S_(4)O_(6)^(2-) +2e^(-)` Equivalent weight of `Na_(2)S_(2)O_(3) . 5H_(2)O` `= ("Mol. Wt.")/(1) = (248)/(1) = 248`