Question

Calculate the volume of concentrated sulphuric acid required to make 1 liter of 0.2N H2SO4. If density of concentrated H2SO4 is 1.83 gm/ml. ?
plz help me !!!!
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Answer 1

We need to make 1 liter of 0.2 N H2SO4.

We know that,

Normality = Basicity of acid X molarity of acid solution

As, Sulphuric acid is a dibasic acid ( H2SO4).

So, basicity of H2SO4 is 2.

0.2 = 2 x molarity

molarity = 0.1 M (molar)

volume = 1 liter

So, number of moles of H2SO4 required= ?

molarity = (moles of H2SO4)/ (liters of solution)

0.1 = x/1

x= 0.1 moles of H2SO4

=> 0.1 moles of H2SO4 are needed.

molar mass of H2SO4 is 1 x 2 + 32 + 4 x 16 => 98 grams per mole.

So, 0.1 moles of H2SO4 is 0.1 x 98 => 9.8 grams of H2SO4.

Density = 1.83 g / mL

mass= 9.8 g

volume =?

d= m / v

1.83 = 9.8/v

v= 9.8/1.83

v =5.355 mL

Hence, 5.355 mL of concentrated sulphuric acid is required.