An aqueous solution containing 0.10 g (formula weight = 214.0) was treated with an excess of KI solution. The solution was acidified with HCl. The liberated consumed 45.0 mL of thiosulphate solution

Question

An aqueous solution containing 0.10 g  (formula weight = 214.0) was treated with an excess of KI solution. The solution was acidified with HCl. The liberated  consumed 45.0 mL of thiosulphate solution decolourise the blue starch-iodine complex. Calculate the molarity of the sodium thiosulphate solution.

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