Zn + H2SO4 --> ZnSO4 + H2
a) Theo PTHH, ta có:
n\(H_2\) = nZn = \(\frac{13}{65}\) = 0,2 mol
V\(H_2\) = 0,2 . 22,4 = 4,48 l (đktc)
b) Theo PTHH, ta có:
n\(H_2SO_4\) = 0,2 mol
m\(H_2SO_4\) = 0,2.98 = 19,6 g
mdd\(H_2SO_4\) = 400.1,5 = 600g
CM = \(\frac{0,2}{0,4}\) = 0,5M
C% = \(\frac{19,6}{600}.100\%\) = 3,27%
c) Theo PTHH, ta có: n\(ZnSO_4\) = 0,2 mol
CM = \(\frac{0,2}{0,4}\) = 0,5 M
m\(ZnSO_4\) = 0,2.161 = 32,2 g
m\(H_2\) = 0,2.2 = 0,4 g
mdd\(ZnSO_4\) = 13 + 600 - 0,4 = 612,6 g
C% = \(\frac{32,2}{612,6}.100\%\) = 5,26 %
nZn = 0.2 mol
mdd H2SO4 = 600 g
Zn + H2SO4 --> ZnSO4 + H2
0.2___0.2________0.2____0.2
VH2 = 0.2*22.4 = 4.48 (l)
CM H2SO4 = 0.2/0.4=0.5 M
mH2SO4 = 19.6 g
C%H2SO4 = 19.6/600*100% = 3.267%
mdd sau phản ứng = 13 + 600 - 0.4 = 612.6 g
CM ZnSO4 = 0.2/0.4 = 0.5M
mZnSO4 = 32.2 g
C%ZnSO4 = 5.25%