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ICSE Class 10 Chemistry Question 4 of 6

Analytical Chemistry — Use of Ammonium & Sodium Hydroxide — Question 2

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Question 2

Action of Ammonium Hydroxide — on solutions of salts   
7. Magnesium chlorideMgCl2 + NH4OH ⟶ ............... + ............... ↓
8. Iron [II] sulphateFeSO4 + NH4OH ⟶ ............... + ............... ↓
9. Iron [III] chlorideFeCl3 + NH4OH ⟶ ............... + ............... ↓
10. Copper [II] sulphateCuSO4 + NH4OH ⟶ ............... + ............... ↓

[Cu(OH)2 + (NH4)2SO4 + NH4OH [in excess] ⟶ ............... + ............... ]
11. Zinc sulphateZnSO4 + NH4OH ⟶ ............... + ............... ↓

[Zn(OH)2 +(NH4)2SO4 + NH4OH [in excess] ⟶ ............... + ...............]
12. Lead nitratePb(NO3)2 + NH4OH ⟶ ............... + ............... ↓
Answer
Action of Ammonium Hydroxide — on solutions of salts   
7. Magnesium chlorideMgCl2 + 2NH4OH ⟶ 2NH4Cl + Mg(OH)2 ↓
8. Iron [II] sulphateFeSO4 + 2NH4OH ⟶ (NH4)2SO4 + Fe(OH)2 ↓
9. Iron [III] chlorideFeCl3 + 3NH4OH ⟶ 3NH4Cl + Fe(OH)3 ↓
10. Copper [II] sulphateCuSO4 + 2NH4OH ⟶ (NH4)2SO4 + Cu(OH)2 ↓

[Cu(OH)2 + (NH4)2SO4 + 2NH4OH [in excess] ⟶ 4H2O + [Cu(NH3)4]SO4]
11. Zinc sulphateZnSO4 + 2NH4OH ⟶ (NH4)2SO4 + Zn(OH)2 ↓

[Zn(OH)2 +(NH4)2SO4 + 2NH4OH [in excess] ⟶ 4H2O + [Zn(NH3)4]SO4]
12. Lead nitratePb(NO3)2 + 2NH4OH ⟶ 2NH4NO3 + Pb(OH)2 ↓