Answer
potassium sulfite: $K_{2} SO_{3}$
potassium bisulfite: $KHSO_{3}$
Work Step by Step
Potassium ion has a +1 charge, sulfite ion is $SO_{3} ^{-2}$ with -2 charge. In order to balance the compound, 2 atoms of potassium should be present each having +1 charge ( $ +1 \times 2 = +2$ ). Thus, the chemical formula is $K_{2} SO_{3}$
The presence of 'bi' in bisulfite means a hydrogen ion is present. Potassium has a +1 charge whereas bisulfite is $HSO_{3}^{-}$ with a -1 charge. Thus the chemical formula is $KHSO_{3}$
