Is my answer in 3 sig fig or 4 sig fig??
A solution is prepared by dissolving 12.80 g of magnesium chlorite in enough water to make 200.0 mL of stock solution. A 25.0 mL aliquot (portion) of this stock solution is then removed and added to 250.0 mL of water. Calculate the concentrations of all ions in the final solution.
You have 4 s.f. in
12.80g
200.0 mL
and 250.0 mL and
3 s.f. in
25.0 mL.
This is multiplication and division; therefore, you are allowed 3 s.f. in the answer.