Question

Calculate the volume of 80% of h2 s o4 required to prepare 1 litre of 20% of h2 s o4

Answer 1

How do I calculate the volume of 80% of H2SO4 by the weight (density= 1.8g/mol) required to prepare 1L of 0.2M solution?

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1 ANSWER



CHAITNAYA KUMAR, Chemist at Element Dynamics & geochemist at ONGC

Answered May 6, 2016 · Author has 92 answers and 52.1k answer views

There is a little correction in the question. Density of 80% sulphuric acid would be 1.8 g/ml not 1.8g/mol.

First you have to calculate the molarity of 80% acid solution which will act as stock solution.

By using the given density 1.8 g/mL

1800 g for 1 litre

Thus, 80% X 1800 =1440g acid  required

Since, molarity = weight taken/ formulae weight

=> 1440/98.80= 14.68 M

Now you have molarity of your stock solution 14.68M

In next step you require 0.2 M acid solution from 14.68M stock solution.

You can use the formulae

                         M1 V1= M2V2

           volume required (V1) = 0.2 X 1000 / 14.68

                                                 = 13.62 ml

13.62 ml of 80 % sulphuric acid is required.

Hope it helps u dud...