a, PT: Zn + H2SO4 ---> ZnSO2 + H2
b, Số mol của kẽm là:
n = \(\frac{m}{M}\)= \(\frac{26}{65}\)= 0,4 (mol )
Theo PT, nH2 = nZn = 0,4 (mol )
Thể tích khí sinh ra là:
V= n. 22,4 = 0,4. 22,4= 3,96 (l )
c, Theo PT : nZnSO4 = nZn = 0,4 (mol )
Khối lượng ZnSO4 thu được là:
m = n. M = 0,4. 161 = 64,4 (g )
a) \(Zn+H_2SO_4\rightarrow ZnSO_4+H_2\uparrow\)
b) \(n_{Zn}=\frac{56}{65}=0,4\left(mol\right)\)
Theo PTHH: \(n_{H_2}=n_{Zn}=1:1\)
\(\Rightarrow n_{H_2}=n_{Zn}=0,4\left(mol\right)\)
\(\Rightarrow V_{H_2\left(đktc\right)}=0,4.22,4=8,96\left(l\right)\)
c) Theo PTHH: \(n_{ZnSO_4}:n_{Zn}=1:1\)
\(\Rightarrow n_{ZnSO_4}=n_{Zn}=0,4\left(mol\right)\)
\(\Rightarrow m_{ZnSO_4}=0,4.161=64,4\left(g\right)\)
a) \(Zn+H_2SO_4\rightarrow ZnSO_4+H_2\)
b) \(n_{Zn}=\frac{26}{64}=0,40625\left(mol\right)\)
Theo PTHH: \(n_{H_2}:n_{Zn}=1:1\)
\(\Rightarrow n_{H_2}=n_{Zn}=0,40625\left(mol\right)\)
\(\Rightarrow V_{H_{2\left(ĐKTC\right)}}=0,40625.22,4=9,1\left(l\right)\)
c) Theo PTHH: \(n_{ZnSO_4}:n_{Zn}=1:1\)
\(\Rightarrow n_{ZnSO_4}=n_{Zn}=0,40625\left(mol\right)\)
\(\Rightarrow m_{ZnSO_4}=0,40625.160=65\left(g\right)\)