In a reaction, Na2S2O3 is converted to Na2S4O6, equivalent weight of Na2S2O3 for this reaction is (mol. wt of Na2S2O3 = M)

Question

In a reaction, Na2S2O3 is converted to Na2S4O6, equivalent weight of Na2S2O3 for this reaction is (mol. wt of Na2S2O3 = M) (A) M (B) M/4 (C) M/2 (D) M/3

Tardigrade Admin · Accepted Answer

2Na2S2O3 → Na2S4O6 + 2Na Mol. wt. of Na2S2O3 = M For this reaction, oxidation state of 1 atom of sulphur on the left side is +2 and on the right hand side of the equation, is 2.5. So, difference is 0.5. Valency factor = no. of atoms × change in oxidation number = 2 × 0.5 = 1 ∴ Equivalent weight = M

Q. In a reaction, Na2​S2​O3​ is converted to Na2​S4​O6​, equivalent weight of Na2​S2​O3​ for this reaction is (mol. wt of Na2​S2​O3​=M)

M

M/4

M/2

M/3

Q. In a reaction, $N a_{2} S_{2} O_{3}$ is converted to $N a_{2} S_{4} O_{6}$ , equivalent weight of $N a_{2} S_{2} O_{3}$ for this reaction is (mol. wt of $N a_{2} S_{2} O_{3} = M)$