How to find a specific moles on ion?

Question

Calculate the moles of sulfate ions found within 167.8 mL of 2.46M Al₂(SO₄)₃ solution. Include the appropriate number of sig figs and unit with substance.

Answer 1

First you need to calculate the number of moles in the solution. You can do this by using your Molar formula

M=n/L (molar = # moles/ liters of fluid).

Once you've found the number of moles of the compound you need to convert that number to the number of Sulfate ions (SO4) you have. (hint: for every 1 mole of compound you have, you should have 3 moles of sulfate ions.)

Sig figs - rule of thumb is that you typically go with the fewest significant figures within the problem (answer should only have 3 significant figures in it).