In a similar experiment, a student needs a 0.50 M KOH solution (MM = 56.11 g/mol). The student only has a 50.00 mL volumetric flask. How much KOH should be added before the flask is filled with water?

Answer 1

0.50M KOH = mols KOH/L solution
0.50 M KOH x 0.050 L = ? mols.
Then mols = grams/molar mass. You know mols and molar mass, solve for grams.

Answer 2

28.055