Question

A student needs to know the molarity of a sulfuric acid solution. It is an older bottle and most of the label has been rubbed off. She can see that it is 98% sulfuric acid by mass and the density of the solution is 1.84 g/mL. If she knows the molar mass of sulfuric acid (98 g), can she calculate the molarity

Answer 1

Answer:

Yes

Explanation:

To calculate the molarity of the sulphuric acid, the student only needs to know its percentage by mass, density and molar mass.

Percentage by mass=98%

Molar mass= 98gmol-1

Density= 1.84gmolmL-1

From

Co= 10pd/M

P= percentage by mass

d= density

M= molar mass

Co= 10×98×1.84/98=18.4M