Question

How many milliliters of an aqueous solution of 0.192 M potassium phosphate is needed to obtain 10.9 grams of the salt? mL

Answer 1

Ans :

mol salt = mass / molar mass

mol = 10.9 g / 212.27 g/mol

= 0.0513 mol

Molarity = mol / volume (L)

putting values :

0.192 M = 0.0513 mol / V

V = 0.267 L

volume in milliliters = 0.267 x 1000 mL

= 267 mL