Question

The label on a stock bottle of acid reads: 56% by mass and 1.25 specific gravity. If the molar mass of the acid is 56, what is the concentration in
grams/dm3
?

Answer 1

Specific gravity is the ratio of the density of a substance to the density (mass of the same unit volume) of a reference substance.

SG = d of acid / d of water = 1.25
d of acid = 1.25 g/cm^3

dm^3 is the same that 1L

1L of this solution has mass: ( 1L or ) 1000* 1.25=1250 g
The part of the acid 1250*0.56=700 g

Concentration is 700 g / dm^3