Question

O solutie acid sulfuric cu masa de 600g si cp=98% reactioneaza cu Mg calculati masa de Mg introdusa in reactie daca puritatea este 80%!
Urgent!!!​

Answer 1

Răspuns:

x g          588 g

Mg +      H₂SO₄ -> MgSO₄ + H₂↑

24g        2*98 g

c H₂SO₄ = md*100/ms =>  md= c*ms/100= 98*600/100=588 g

x= 24*588/2*98= 72 g = m pur

p= m pur*100/m total => m total= m pur*100/p =>  m total (Mg) = 72*100/80=90 g