Chemistry
(a) What do you observe when ammonium hydroxide is added to the aqueous solution of :
(i) FeSO4
(ii) Iron (III) chloride.
(iii) Lead nitrate
(iv) Zinc nitrate
(b) Write balanced equation for Q.8(a).
Ammonia
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Answer
(i) Dirty green ppt. of ferrous hydroxide is formed which is insoluble in excess of NH4OH.
(ii) Reddish brown ppt. of ferric hydroxide is formed which is insoluble in excess of NH4OH.
(iii) White ppt. of lead hydroxide is formed which is insoluble in excess of NH4OH.
(iv) White gelatinous ppt. of Zinc hydroxide is formed which is soluble in excess of NH4OH.
(b) The balanced chemical equations are given as :
(i) FeSO4 + 2NH4OH ⟶ (NH4)2SO4 + Fe(OH)2 ↓
(ii) FeCl3 + 3NH4OH ⟶ 3NH4Cl + Fe(OH)3 ↓
(iii) Pb(NO3)2 + 2NH4OH ⟶ 2NH4NO3 + Pb(OH)2 ↓
(iv) Zn(NO3)2 + 2NH4OH ⟶ 2NH4NO3 + Zn(OH)2 ↓
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Related Questions
Give balanced equations for the following conversions :
(a) Ammonia to nitrogen using an acidic gas.
(b) Ammonia to brown gas.
(c) Ammonia to nitrogen trichloride
(d) Ammonia solution to an amphoteric hydroxide
(e) A nitride of a trivalent metal to ammonia
(f) Lead oxide to lead
Distinguish between the following (using ammonia solution) :
(a) Calcium chloride and zinc chloride.
(b) Ferric salt and ferrous salt
(c) Zinc nitrate and lead nitrate
Give chemical equation(s) to prove that NH3 contains nitrogen and hydrogen?
Copy and complete the following equations.
(a) AlN + H2O ⟶
(b) 2NH3 + 3PbO ⟶
(c) NH3 + 3Cl2 ⟶
(d) NH3 + CO2 ⟶
(i) Which property of ammonia is illustrated by equation (c)?
(ii) What important fertiliser is prepared from equation (d)? State the conditions.