# W/w solution

Question asked by Allison Williams on Feb 22, 2019

I am hoping someone can mark my calculatlions and tell me if I am correct or not?

if I need to make a 400ml, 5% w/w solution of 98% sulphuric acid/water, how much sulphuric acid will I need to add?

The weight of 98% sulphuric acid equals (approx) 1.84grams per 1 ml of liquid. The weight of water equals 1gram per 1ml of liquid.

Therefor a weight/weight solution of 5% in 400ml (20grams) would only require 10.86ml of 98% sulphuric acid.

20g divided by 1.84g = 10.86ml of liquid

Am am I correct in my calculations?

Any help is appreciated
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