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Questions 1.8

Use the valencies given in Table 1.8.1 to write the chemical formulae of the compounds named in Questions 1 and 2.


    1. Hydrogen chloride (same formula as hydrochloric acid)
    2. Potassium hydroxide
    3. Magnesium chloride
    4. Calcium carbonate
    5. Calcium chloride
    6. Aluminium oxide
    7. Sodium sulphate
    8. Potassium nitrate
    9. Ammonium nitrate
    10. Carbon (IV) oxide
    11. Zinc sulphate
    12. Copper nitrate
    13. Ammonium phosphate (V)
    14. Silver nitrate

    1. Lead (II) oxide
    2. Lead (II) nitrate
    3. Iron (II) oxide
    4. Iron (III) oxide
    5. Iron (II) sulphate
    6. Copper (II) oxide
    7. Copper (I) sulphide
    8. Manganese (IV) oxide
    9. Sulphur (VI) oxide
    10. Sulphur (IV) oxide

NB: The values given in roman numbers are the valencies of the metals involved.



Answers to Questions 1.8

    1. Hydrochloric acid HCl
    2. Potassium hydroxide KOH
    3. Magnesium chloride MgCl2
    4. Calcium carbonate CaCO3
    5. Calcium chloride CaCl2
    6. Aluminium oxide Al2O3
    7. Sodium sulphate Na2SO4
    8. Potassium nitrate KNO3
    9. Ammonium nitrate NH4NO3
    10. Carbon (IV) oxide CO2
    11. Copper (II) nitrate Cu(NO3)2
    12. Ammonium phosphate (V) (NH4)3PO4
    13. Silver nitrate AgNO3

    1. Lead (II) oxide PbO
    2. Lead (II) nitrate Pb(NO3)2
    3. Iron (II) oxide FeO
    4. Iron (III) oxide Fe2O3
    5. Iron (II) sulphate FeSO4
    6. Copper (II) oxide CuO
    7. Copper (I) oxide Cu2S
    8. Manganese (IV) oxide MnO2
    9. Sulphur (VI) oxide SO3
    10. Sulphur (IV) oxide SO2