A solution of Na2S2O3 is standardized iodimetrically against 0.1262 g of Mr%. This process requires 45 mL of the Na2 S2O3 solution. What is the strength of the Na2S2O3?
(2) 0.1 M
(4) 0.1 N
v.f = 1v. = 6
by m.e. of Na2S2O3 = m.e. of KBrO3
molarity of Na2S2O3 = 0.1 M