Question

2 moli de zinc sunt atacati de acid sulfuric.
Ce produsi rezulta si in ce cantitati?
Cate grame de acid sulfuric s-au folosit in aceasta reactie?

Answer 1

Zn + H2SO4 = ZnSO4 + H2
M H2SO4 = 2*1+32+4*16 = 98
M ZnSO4 = 65+32+4*16 = 161
M H2 = 2*1 = 2
1 mol Zn.........98 g H2SO4.........161 g ZnSO4...........2 g H2
2 moli Zn................x..........................y..............................z
x = 196 g H2SO4
y = 322 g ZnSP4
n = m/M = 322/161 = 2 moli ZnSO4
z = 4 g H2
n = m/M = 4/2 = 2 moli H2