The symbols of a few ions are given in the box.
[`Ca^(2+), Cl^-, NH_4^+, SO_4^(2-)`]
a) Identify the cations
b) Identify the anions
c) Write down the molecular formula of all the possible compounds using the given cation and anions.

Explanation

a) Cations - calcium ion (.Ca^(2+).), Ammonium ion (.NH_4^+.)
b) Anions - Chloride ion (.Cl^-.), Sulphate ion (.SO_4^(2-).)
c) . CuSO_4, CaCl_2, (NH_4)_2SO_4, NH_4Cl.