Question

Determine one cation and anion from given salt?

Answer 1

You can determine the cation and anion in a given salt by looking at its charge in the periodic table.

Cations are positively-charged atoms or compounds such as Hydrogen (H+) and Lithium (LI2+).  

Anions on the other hand, are negatively-charged atoms or compounds such as Fluorine (F-) and sufate (SO42-).

Answer 2

For example we take sodium hydroxide that is NaOH.

Now we know that Na is the positive ion and OH negative Ion.

So it's Na+ and OH-.

Here sodium being the positive charge is the cation where is hydroxide being the negative charge.

In the process of electrolysis the cation is always attracted towards the cathode and anion is attracted towards the anode.