Question

If the density of methanol is 0.793 kg per liter what is volume required to make 2.5l of 0.25m solution​

Answer 1

· Molarity=Moles of soluteVolume of solution (in litres). For given solution Density of methanol =0.793 kg/L=793 g/L. Volume=MassDensity.

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Answer 2

Explanation:

Molarity

=

Moles of solute

Volume of solution (in litres)

For given solution

0.25 M

=

n

2.5 L

n = 0.625 moles

0.625 moles

of methanol is needed.

Molar mass of methanol

(

CH

3

OH

)

=

32 g/mol

• Mass of methanol needed

=

0.625

mol

×

32 g

mol

=

20 g

Density of methanol

=

0.793 kg/L

=

793 g/L

Volume

=

Mass

Density

• Volume of methanol needed

=

20 g

793 g/L

=

0.0252 L

=

25.2 mL