Based upon the ion charge of the following polyatomic ions predict the formula for the following compounds. sulfate SO4 -2 phosphate PO4 -3 hydroxide OH- sodium hydroxide?

The formula for sulfate is SO4-2; for phosphate is PO4-3; and for hydroxide is OH-. Sodium has a 1+ charge, so in sodium hydroxide (NaOH), the sodium ion will combine with the hydroxide ion to form NaOH.