Zn+2HCl−−−>ZnCl2+H2 (1)
Fe+2HCl−−−>FeCl2+H2(2)
a)
mFe=60,5.46,289/100=28(g)
=>nFe=28/56=0,5(mol)
=>mZn=60,5−28=32,5(g)
=>nZn=32,5/65=0,5(mol)
b)
Theo PTHH (1) và (2) nH2=0,5+0,5=1(mol)
=>VH2(đktc)=1.22,4=22,4(l)
c)
Theo (1) nZnCl2=nZn=0,5(mol)
=>mZnCl2=0,5.136=68(g)
Theo (2) nFeCl2=nFe=0,5(mol)
=>mFeCl2=0,5.127=63,5(g)
a) Ta có: mFe = \(\dfrac{60,5.49,289}{100}\approx28\left(g\right)\)
⇒
mZn = 60,5 - 28 = 32,5g
b) PTPỨ: Zn + 2HCl →→ ZnCl2 + H2 (1)
Fe + 2HCl →→ FeCl2 + H2 (2)
Theo ptr (1): nH2 (1) = nZn = \(\dfrac{32,5}{65}=0,5\left(mol\right)\)
Theo ptr (2) : n H2 (2) = nFe = \(\dfrac{28}{56}=0,5\left(mol\right)\)
⇒VH2 = (nH2 (1) + nH2 (2) ) . 22,4 = (0,5 + 0,5).22,4=22,4 lít
c) Theo (1): nZnCl2 = nZn = 0,5 mol
⇒⇒ mZnCl2 = 0,5.136 = 68(g)
Theo (2): nFeCl2 = nFe = 0,5 mol
⇒
mFeCl2 = 0,5 . 127 = 63,5 g