Răspuns:
A,Mg=24g/mol
M,HCl= 36,5g/mol
M,MgCl2=95g/mol
24g........2x36,5g.........95g ..1mol
Mg + 2HCl-----> MgCl2 + H2
400g............x..................y.............z
x-=m=1216,7gHCl---> m,dizolvat
y=m=1583,3gMgCl2
z=n(niu)=16,67molH2
a) c=mdx100/ms--> ms= mdx100/c=1216,7x100/25g=4866,8g
b)vezi y
c) vezi z
Explicație:
