Question

what is the name of the compound with the formula kcn? what is the name of the compound with the formula nahso4? what is the name of the compound with the formula mg(oh)2?

Explanation:

1. For $Mg(OH)_2$, magnesium has a +2 charge and hydroxide ($OH^-$) has a - 1 charge. The naming convention for ionic compounds gives the name magnesium hydroxide.
2. For $NaHSO_4$, sodium ($Na^+$) is the cation. The anion is $HSO_4^-$, called hydrogen sulfate. So the compound is named sodium hydrogen sulfate.
3. For $KCN$, potassium ($K^+$) is the cation and the cyanide ion ($CN^-$) is the anion. So the compound is named potassium cyanide.

Answer:

1. Magnesium hydroxide
2. Sodium hydrogen sulfate
3. Potassium cyanide