Question

What is the name of the cation in each of the following compounds?

`CaO`
`Na_2SO_4`
`KCIO_4`
`Fe(NO_3)_2`
`Cr(OH)_3`

Answer 1

`"Calcium, sodium, potassium, iron, and chromium ions."`

Explanation:

The actual cations are `Ca^(2+)`, `Na^+`, `K^+`, `Fe^(2+)`, and `Cr^(3+)`. An ionic material forms when the charges of anion and cations are balanced. All of I have done here is to balance the charges. `ClO_4^-`, `NO_3^-`, and `SO_4^(2-)` are ions you will learn to recognize.