Question

. How many moles of Na2S2O3 are needed to react with 0.40 moles of Cl2?

A. 0.10 mol Na2S2O3
B. 0.20 mol Na2S2O3
C. 0.30 mol Na2S2O3
D. 0.40 mol Na2S2O3
E. 0.50 mol Na2S2O3
use the following: Chlorine is used to bleach cloth. Excess Chlorine is destroyed by its reaction with Sodium Thiosulfate (Na2S2O3) according to the unbalanced equation Na2S2O3 + Cl2 + H2O → NaHSO4 + HCl.

Answer 1

Na2S2O3 + 4Cl2 + 5H2O → 2NaHSO4 + 8HCl
A. 0.10 mol Na2S2O3