Question

Calculati masa de apa care trebuie evaporata din 300 grame de solutie acid clorhidric,de concentratie 10% pentru a ajunge la concentratia de 25%

URGENT!!!!​

Answer 1

ms=300g

c1=10%

c2=25%

c=ms/md*100

md=ms/100*c

md=30g

c2=md/ms2*100

25=30/ms2*100

ms2=30*100/25

ms2=120g

mapa=ms2-md

mapa=120-30=90g

sper că te-am ajutat