Question

Oxides and hydroxides of certain metals i.e [iron/ zinc / copper / aluminium / magnesium / lead] are amphoteric and react with [acids / alkalis / acids and alkalis] to give salt and water.

July 31, 2024

Answer

Oxides and hydroxides of certain metals i.e zinc, aluminium, lead are amphoteric and react with acids and alkalis to give salt and water.

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💡 Some Related Questions

Action of Alkalis — on oxides and hydroxides of certain metals
Zinc oxide ZnO + NaOH ⟶ +
Zinc hydroxide Zn(OH)₂ + NaOH ⟶ +
Lead [II] oxide PbO + NaOH ⟶ +
Lead hydroxide Pb(OH)₂ + NaOH ⟶ +
Aluminium oxide Al₂O₃ + NaOH ⟶ +
Aluminium hydroxide Al(OH)₃ + KOH ⟶ +

Action of Alkalis — on certain metals
Zinc Zn + NaOH ⟶ +
Zinc Zn + KOH ⟶ +
Lead Pb + NaOH ⟶ +
Lead Pb + KOH ⟶ +
Aluminium Al + NaOH + H₂O ⟶ +
Aluminium Al + KOH + H₂O ⟶ +

Action of Ammonium Hydroxide – on solutions of salts
Magnesium chloride MgCl₂ + NH₄OH ⟶ + ↓
Iron [II] sulphate FeSO₄ + NH₄OH ⟶ + ↓
Iron [III] chloride FeCl₃ + NH₄OH ⟶ + ↓
Copper [II] sulphate CuSO₄ + NH₄OH ⟶ + ↓ [Cu(OH)₂ + (NH₄)₂SO₄ + NH₄OH [in excess] ⟶ + ]
Zinc sulphate ZnSO₄ + NH₄OH ⟶ + ↓ [Zn(OH)₂ +(NH₄)₂SO₄ + NH₄OH [in excess] ⟶ + ]
Lead nitrate Pb(NO₃)₂ + NH₄OH ⟶ + ↓

Complete and balance the equations
Pb(NO3)2 + NaOH ⟶ …………… + …………… ↓
[Pb(OH)2 + NaOH [in excess] ⟶ …………… + ……………]

Complete and balance the equations
ZnSO4 + NaOH ⟶ …………… + …………… ↓
[Zn(OH)2 + NaOH [in excess] ⟶ …………… + ……………]

Complete and balance the equations
CuSO4 + NaOH ⟶ …………… + …………… ↓

Complete and balance the equations
FeCl3 + NaOH ⟶ + ↓

Complete and balance the equations
MgCl2 + NaOH ⟶ + ↓

Complete and balance the equations
Ca(NO3)2 + NaOH ⟶ + ↓

To distinguish soluble salts of zinc and lead, ____ [NaOH / NH4OH] can be used.

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