SPM Chemistry

Preparing Soluble Salts

spmchemistry

Preparation of Soluble Salts

  1. There are 2 things to be considered when preparing a salt:
    1. What are the chemical used?
    2. How to separate the salt from other substance?
  2. Method used to prepare salt depends on the solubility of the salt.
  3. Soluble salts are prepared from the reactions between an acid with a metal/ base/ metal carbonate.
  4. 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.
  1. Sodium Chloride
  2. Ammonium Nitrate
  3. Potassium sulphate
  4. Zinc Sulphate (3 equations)
  5. Lead(II) nitrate(3 equations)
  6. Copper sulphate(2 equations)
Answer: a. Sodium Chloride
NaOH + HCl → NaCl + H2O
b. Ammonium Nitrate
NH3 + HNO3 → NH4NO3
c. Potassium sulphate
KOH + H2SO4 → K2SO4 + H2O
d. Zinc Sulphate (3 equations)
ZnO +  H2SO4 → ZnSO4 + H2O
Zn  + H2SO4 → ZnSO4 + H2
ZnCO3  + H2SO4 → ZnSO4 + H2O + CO2
e. Lead(II) nitrate(3 equations)
PbO +  2HNO3 → Pb(NO3)2 + H2O
Pb  + 2HNO3 → Pb(NO3)2 + H2
PbCO3  + 2HNO3 → Pb(NO3)2 + H2O + CO2
f. Copper sulphate(2 equations)
CuO +  H2SO4 → CuSO4 + H2O
CuCO3  + H2SO4 → CuSO4 + H2O + CO2