Write the formula for iron (III) sulfate.

My answer is Fe2(SO4)3

Correct

Well done, your answer is correct! The formula for iron (III) sulfate is indeed Fe2(SO4)3.

To arrive at this formula, you need to consider the charges of the ions involved. Iron (III) indicates that iron has a +3 charge, while sulfate (SO4) has a -2 charge.

First, you need to balance the charges. Since iron has a +3 charge and sulfate has a -2 charge, you will need two iron ions to balance out the charges. This yields Fe2.

Next, you need to determine the number of sulfate ions needed to balance the overall charge. Since each sulfate ion has a -2 charge, three sulfate ions are required to neutralize the +6 charge from the two iron ions. Therefore, the formula becomes (SO4)3.

Putting it all together, the formula for iron (III) sulfate is Fe2(SO4)3.