Which chemical formula is correctly matched with its name?

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Multiple Choice

Which chemical formula is correctly matched with its name?

Explanation:
AlPO4 is aluminum phosphate because aluminum forms a 3+ ion (Al3+) and the phosphate ion is PO4 3−. Together they balance to make a neutral compound, giving the name aluminum phosphate for the formula AlPO4. The other formulas correspond to different ions: CaSO3 is calcium sulfite (SO3 2−), not calcium sulfide; LiNO2 is lithium nitrite (NO2−), not lithium nitrate (NO3−); NaClO is sodium hypochlorite (ClO−), not sodium chlorite (ClO2−).

AlPO4 is aluminum phosphate because aluminum forms a 3+ ion (Al3+) and the phosphate ion is PO4 3−. Together they balance to make a neutral compound, giving the name aluminum phosphate for the formula AlPO4.

The other formulas correspond to different ions: CaSO3 is calcium sulfite (SO3 2−), not calcium sulfide; LiNO2 is lithium nitrite (NO2−), not lithium nitrate (NO3−); NaClO is sodium hypochlorite (ClO−), not sodium chlorite (ClO2−).

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