Question

write the cation and anion of aluminum sulphate​

Answer 1

The sulfate anion has a −2 charge, whereas the aluminum cation has a +3 charge. The ionic compound must be electrically neutral. Thus we take 2 aluminum ions (6+ charge) and 3 sulfate ions (6-) charge, and achieve electrical neutrality.

Answer 2

Cation:

${al}^{3 + }$

Anion:

${so4}^{2 - }$

Here , al is referred as Al

and so4 as SO4(4in subscript)

Hope this answer helps you ^_^ !