Question

Calculate the mass by volume percent of 20 solution by mass of sulphuric acid

Answer 1

Answer:

Explanation:

%

w/w

=

Mass of solute

Mass of solution

×

100

20

%

w/w

means  

20 g

of sulfuric acid is present in  

100 g

of water

Density of water =  

1 g/mL

Volume of water in given solution =  

100 g

1 g/mL

=

100 mL

=

0.1 L

Molar mass of  

H

2

SO

4

=

98 g/mol

Moles of  

H

2

SO

4

in given solution =  

20 g

98 g/mol

=

10

49

mol

Molarity

=

Moles of solute

Volume of solution (in litres)

Molarity

=

10

49

mol

0.1 L

=

2.04 mol/L