Question

Na2S2O3 (aq) + 2HNO3 (aq) →

a. 2NaNO3 (aq) + H2O (l) + SO2 (g) + S (s)

b. H2O (l) + SO2 (g) + S (s)

c. 2NaNO3 (aq) + H2O (l) + S (s)

d. 2NaNO3 (aq) + H2O (l) + SO2 (g)

Answer 1

Answer: The correct answer is Option a.

Explanation:

The reaction between sodium thiosulfate and nitric acid produces a number of products. The balanced chemical equation for the reaction of two follows:

$Na_2S_2O_3(aq.)+2HNO_3(aq.)\rightarrow 2NaNO_3(aq.)+H_2O(l)+SO_2(g)+S(s)$

By Stoichiometry of the reaction:

1 mole of sodium thiosulfate reacts with 2 moles of nitric acid to produce 2 moles of sodium nitrate, 1 mole of water, 1 moles of sulfur dioxide and 1 mole of solid sulfur.

Hence, the correct answer is Option a.