a) Ta có: mFe = \(\frac{60,5.46,289}{100}\) \(\approx\) 28g
\(\Rightarrow\) mZn = 60,5 - 28 = 32,5g
b) PTPỨ: Zn + 2HCl \(\rightarrow\) ZnCl2 + H2 (1)
Fe + 2HCl \(\rightarrow\) FeCl2 + H2 (2)
Theo ptr (1): nH2 (1) = nZn = \(\frac{32,5}{65}\)= 0,5 mol
Theo ptr (2) : n H2 (2) = nFe = \(\frac{28}{56}\) = 0,5 mol
\(\Rightarrow\) VH2 = (nH2 (1) + nH2 (2) ) . 22,4 = (0,5 + 0,5).22,4=22,4 lít
c) Theo (1): nZnCl2 = nZn = 0,5 mol
\(\Rightarrow\) mZnCl2 = 0,5.136 = 68(g)
Theo (2): nFeCl2 = nFe = 0,5 mol
\(\Rightarrow\) mFeCl2 = 0,5 . 127 = 63,5 g
Zn+2HCl\(\rightarrow\)ZnCl2+H2\(\uparrow\)
1 2 1 1 (mol)
0.5 (mol)
Fe+2HCl\(\rightarrow\)FeCl2+H2\(\uparrow\)
1 2 1 1 (mol)
0.5 (mol)
mFe=60.5\(\times\)46,289=28(g)
nFe=\(\dfrac{m}{M}\)=\(\dfrac{28}{56}\)=0.5(mol)
mZn=60.5-28=32.5(g)
nZn=\(\dfrac{m}{M}\)=\(\dfrac{32.5}{65}\)=0.5(mol)
nH2(1)=\(\dfrac{0.5\times1}{1}\)=0.5(mol)
nH2(2)=\(\dfrac{0.5\times1}{1}\)=0.5(mol)
nH2(1,2)=0.5+0.5=1 (mol)
VH2=1\(\times\)22.4=22.4(l)
nZnCl2=0.5 (mol)
mZnCl2=0.5\(\times\)136=68(g)
nFeCl2=0.5(mol)
mFeCl2=0.5\(\times\)127=63.5(g)