Question

1. The flow charts below shows some reaction starting with zinc nitrate. Study it and answer the question that follows.
   
   1. State the condition necessary in step I. 
   2. Identify:
      1. Reagent Z 
      2. Gas C 
      3. Acidic product E and F. 
2. Write equation for the reaction in:
   1. Step I 
   2. Step II 
   3. Step VI 

Answer 1

1.  
   1. Heating 
   2.  
      1. Reagent Z - Na₂CO₃, K₂CO₃ or (NH₄)₂CO₃ 
      2. Gas C - Oxygen gas 
      3. Acidic product E and F. 
         • E - Nitric (III) acid 
         • F- Nitric (V) acid 
2.  
   1. Step 1
      2Zn(NO₃)_2(s) → 2ZnO_(s) + 4NO_2(aq) +O_2(g) 
   2. Step 2
      2NO_2(g) + H₂O_(l) → HNO_3(aq) + HNO_2(aq) ✓1
   3. Step 6
      Zn(NO₃)_2(aq) + Na₂CO_3(aq) → ZnCO_3(l) + 2NaNO_3(aq) 
                    Use Na₂CO₃, K₂CO₃ or (NH₄)₂CO₃ in the above equation