Question

18g of solid dissolved in 72g of water. find the w/w% of solution​
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Answer 1

Answer

It is given that vapour pressure of water,PIo = 23.8 mm of Hg

Weight of water taken, w1= 850 g

Weight of urea taken, w2= 50 g

Molecular weight of water, M1= 18 g mol - 1

Molecular weight of urea, M2= 60 g mol - 1

Now, we have to calculate vapour pressure of water in the solution. We take vapour pressure as p1