Preparation of Soluble Salts
- There are 2 things to be considered when preparing a salt:
- What are the chemical used?
- How to separate the salt from other substance?
- Method used to prepare salt depends on the solubility of the salt.
- Soluble salts are prepared from the reactions between an acid with a metal/ base/ metal carbonate.
- Diagram below shows the chemical reaction that can be used to prepare the soluble salts.
Example: Write chemical equation(s) for the reaction that can be used to prepare the following salts.
- Sodium Chloride
- Ammonium Nitrate
- Potassium sulphate
- Zinc Sulphate (3 equations)
- Lead(II) nitrate(3 equations)
- Copper sulphate(2 equations)
NaOH + HCl → NaCl + H2Ob. Ammonium Nitrate
NH3 + HNO3 → NH4NO3c. Potassium sulphate
KOH + H2SO4 → K2SO4 + H2Od. Zinc Sulphate (3 equations)
ZnO + H2SO4 → ZnSO4 + H2O
Zn + H2SO4 → ZnSO4 + H2
ZnCO3 + H2SO4 → ZnSO4 + H2O + CO2e. Lead(II) nitrate(3 equations)
PbO + 2HNO3 → Pb(NO3)2 + H2O
Pb + 2HNO3 → Pb(NO3)2 + H2
PbCO3 + 2HNO3 → Pb(NO3)2 + H2O + CO2f. Copper sulphate(2 equations)
CuO + H2SO4 → CuSO4 + H2O
CuCO3 + H2SO4 → CuSO4 + H2O + CO2