Question

Calculeaza masa de acid sulfuric dizolvat in 500 ml solutie de concentratie 20% si densitate de 1,143 g/ml.Cu regula de trei simpla

Answer 1

SO4
Mso4 =1·As + 4·Ao
=1·32 + 4·16
=32 + 64
=97. 1 mol SO4 =97 de grame .
Dacă SO4= 500ml soluţie
500 ....... ....................1, 143
20 ..................................x grame.
500· 1 , 143 5727, 100
x=----------------------- =------------------ =286, 355
20. 20