A solution of `Na_2S_2O_3` is standardized iodometrically against `0.167g` of `KBrO_3`. This process requires `50mL` of the `Na_2 S_2O_3` solution. What is the normality of the `Na_2S_2O_3.` ?

What is the molarity of 0.2N Na_2CO_3 solution ?

Na_2S_2O_3 is reduced by I_2 to :

What is the oxidation number of S in Na2S2

What is the oxidation state of S in H_2S_2O_7 and SO_3 ?

Calculate the formmula unit mass of ZnO, Na_2O,K_2CO_3 .

What is the co-ordination number of sodium in Na_(2)O ?

A mixture containing 0.05 mole of K_2Cr_2O_7 and 0.02 mole of KMnO_4 was treated with excess of KI in acidic madium. The librated iodine required 1.0L of NaS_2 O_3 solution for titration. Concentration of Na_2 S_2 O_3 solution was :

A 0.276 g impure sample of copper ore is dissolved and Cu^(2+) is titrated with KI solution. I_(2) liberated required 40 mL of 0.1 M Na_(2) S_(2) O_(3) solution for titration. What is the % of impurities in the ore ?