Cu nu reactioneaza cu HCl, deci H2 care se degaja provine din reactia;
n(niu),Mg= 2,24l/22,4l/mol= 0,1mol
1mol................................1mol
Mg + 2HCl---> MgCl2 +H2
x=0,1mol...........................0,1mol
m,Mg= 0,1molx24g/mol= 2,4g; m,Cu= 10-2,4=>7,6g
10g amestec.......2,4gMg..................7,6gCu
100g...................x..............................y.............................calculeaza !!!
n,H2= 0,1mol
1mol..........................6,023x10²³molec
0,1mol..........................x.........................................calculeaza !!!!
