Question

Write the chemical formulae for the following compounds:

a)Copper (II) bromide (b) Aluminium (III) .nitrate (c) Calcium (II) phosphate

d) Iron (III) sulphide (e) Mercury (II) chloride (f) Magnesium (II) acetate.

Answer 1

• The formula of compound is formed by crossing over the valencies of the elements present in the compound

1. Copper (II) bromide = ${\mathrm{CuBr}}_2$
2. Aluminium (III) .nitrate = $\mathrm{Al}{\left({\mathrm{NO}}_3\right)}_3$
3. Calcium (II) phosphate =${\mathrm{Ca}}_3{\left({\mathrm{PO}}_4\right)}_2$
4. Iron (III) sulphide = ${\mathrm{Fe}}_2{\mathrm{S}}_3$
5. Mercury (II) chloride = ${\mathrm{HgCl}}_2$
6. Magnesium (II) acetate =.$\mathrm{Mg}{\left({\mathrm{CH}}_3\mathrm{COO}\right)}_2$