Question

Cat SO3 trebuie adaugat peste 200 g H2SO4 de concentratie 49% pentru a se obtine un acid de concentratie 98%?

Answer 1

solutia initiala de H2SO4

msi = 200g

ci = 98 %

md = 196 g

mH2O = 4g

nH2O = 4 / 18 = 2 % 9 moli

SO3

80 / 80 = 1 mol

H2O => H2SO4

2 / 9 moli => 2 / 9 moli H2SO4 + 7 / 9 moli

( mdf = 7 / 9 × 80 = 560 / 9 g )

solutia finala : ms = 200 + 80 = 280 g oleum

md = 560 / 9 g

c = ( 560 / 9 ) × 100 / 280 = 22 , 22 %