Question

Calculate the mass of H2SO4 required to prepare it's 250 ml solution of 0.2 M strength

Answer 1

Explanation:

Molarity, M=

volume(L)

no. of moles

​

Volume, V=250mL=0.25L

No. of moles, n= mass/molar mass

Mass = 49 g

Molar mass of H

2

​

SO

4

​

 = 98  g

n=49/98=0.5

M=0.5/0.250=2M