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

Question

Chemistry

Pamela Ellis

8 February, 02:11

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

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Answers (1)

Know the Answer?

Cheyanne Acosta · Answer 1

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