AgNO3 -- (W) + (X) + O2 ; (X) + H2O - HNO2 + HNO3 ; (W) + HNO3 - Y + NO + H2O ; (Y) + Na2S2O3 (excess) - (Z) + NaNO3. Identify (W) to (Z):

Question

AgNO3 -$\Delta$-> (W) + (X) + O2 ; (X) + H2O -> HNO2 + HNO3 ; (W) + HNO3 -> Y + NO + H2O ; (Y) + Na2S2O3 (excess) -> (Z) + NaNO3. Identify (W) to (Z):

Prashant Kotian · Accepted Answer

Correct answer: C. Step 1: Thermal decomposition of silver nitrate yields metallic silver (W), nitrogen dioxide gas (X), and oxygen gas: 2AgNO3 --Δ--> 2Ag + 2NO2 + O2. NO2 (X) reacts with water to form HNO2 and HNO3. Step 2: Metallic silver (W) dissolves in nitric acid to form silver nitrate, AgNO3 (compound Y). Step 3: Dissolving AgNO3 in excess sodium thiosulfate (Na2S2O3) forms a stable, soluble complex. The textbook answer key specifically matches the stoichiometry to Na5[Ag(S2O3)3] (Z), corresponding to option (c).

💡 Solution & Explanation

Practice 22,000+ questions like this