Answer to Question #114541 in General Chemistry for Prince Agu

Question

Calculate the mass of hydrated ethanedioic acid required to prepare 250cm3 of a 0.1moldm3 solution. Molar mass of ethanedioic acid =126g/mol.

Answer 1

$n=cV$ , c - solution molarity, n - chemical amount of substance (mol), V - solution volume (dm³).

V=250cm³=0,250dm³

n=0,1mol/dm^3*0,250dm³=0,025mol

$m=nM$ , c - solution molarity, n - chemical amount of substance, V - solution volume.

m=0,025mol*126g/mol=3,15g

Answer:3,15g