19 Feb

You perform the titration as follows:

You dissolve 0.1446 g KIO3 in 25 mL H2O, and then added 2.05 g KI and 5 mL H2SO4. (solution I). You dissolve 2.5153 g of the synthesized NaS2O3 in 100 mL H2 (solution II). You titrate the solution II into solution I. 38 mL of solution II is requrid to reach the endpoint.

Calculate the % by weight of Na2S2O3 in the synthesized product and obtain the number of waters in the crystal form.

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