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\(n_{HCl}=0,3.1=0,3\left(mol\right)\\
pthh:Fe+2HCl\rightarrow FeCl_2+H_2\)
0,15 0,3 0,15
\(m_{Fe}=0,15.56=8,4\left(g\right)\\
V_{H_2}=0,15.22,4=3,36\left(l\right)\)
\(a\)) \(PTHH:Zn+2HCl\underrightarrow{t^o}ZnCl_2+H_2\)
0,25 0,5 0,25 0,25
b) nZn=\(\dfrac{m}{M}=\dfrac{16,25}{65}=0,25\left(mol\right)\)
\(V_{H_2}=n.22,4=0,25.22,4=5,6\left(l\right)\)
c) \(m_{HCl}=n.M=0,5.36,5=18,25\left(g\right)\)
a, \(n_{H_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
Zn + 2HCl -----> ZnCl2 + H2
0,2 0,4 0,2 0,2
b, \(m_{Zn}=0,2.65=13\left(g\right)\)
\(m_{HCl}=0,4.36,5=14,6\left(g\right)\)
c, \(m_{ZnCl_2}=0,2.136=27,2\left(g\right)\)
\(a,n_{H_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
PTHH: Zn + 2HCl ---> ZnCl2 + H2
0,2<--0,4<--------0,2<---0,2
\(b,\left\{{}\begin{matrix}m_{Zn}=0,1.65=13\left(g\right)\\m_{HCl}=0,4.36,5=14,6\left(g\right)\end{matrix}\right.\\ c,m_{ZnCl_2}=0,2.136=27,2\left(g\right)\)
\(n_{Zn\left(pứ\right)}=1,3-0,65=0,65g\)
\(n_{Zn}=\dfrac{0,65}{65}=0,01mol\)
\(Zn+2HCl\rightarrow ZnCl_2+H_2\)
0,01 0,02 0,01 0,01 ( mol )
\(V_{H_2}=0,01.24=0,24l\)
\(m_{HCl}=\dfrac{0,02.36,5}{7,3\%}=10g\)
\(m_{ZnCl_2}=0,01.136=1,36g\)
\(m_{ddspứ}=1,3+10-0,01.2=11,28g\)
\(C\%_{ZnCl_2}=\dfrac{1,36}{11,28}.100=12,05\%\)
a, PT: \(Zn+2HCl\rightarrow ZnCl_2+H_2\)
b, Ta có: \(n_{Zn}=\dfrac{32,5}{65}=0,5\left(mol\right)\)
Theo PT: \(n_{H_2}=n_{Zn}=0,5\left(mol\right)\)
\(\Rightarrow V_{H_2}=0,5.22,4=11,2\left(l\right)\)
c, Theo PT: \(n_{ZnCl_2}=n_{Zn}=0,5\left(mol\right)\)
\(\Rightarrow m_{ZnCl_2}=0,5.136=68\left(g\right)\)
\(n_{HCl}=0,25.2=0,5\left(mol\right)\\ a,PTHH:Zn+2HCl\rightarrow ZnCl_2+H_2\\ b,n_{Zn}=n_{H_2}=n_{ZnCl_2}=\dfrac{0,5}{2}=0,25\left(mol\right)\\ m_{Zn}=0,25.65=16,25\left(g\right)\\ c,V_{H_2\left(đktc\right)}=0,25.22,4=5,6\left(l\right)\)
Không biết đúng không nữa;-;;;
a) PTHH: Zn + 2HCl -> ZnCl2 + H2
b) HCl=250ml=0,25l
n2HCl= V/22,4= 0,5/22,4= 0,02(mol)
Zn + 2HCl -> ZnCl2 + H2
1 2 1 1
0,01 <-0,5--------------> 0,01
mZn= n.M= 0,01.65= 0,65(gam)
c) VH2=n . 22,4= 0,01 . 22,4= 0,224(l)
a) Zn + 2HCl --> ZnCl2 + H2
b) \(n_{Zn}=\dfrac{1,3}{65}=0,02\left(mol\right)\)
PTHH: Zn + 2HCl --> ZnCl2 + H2
0,02-->0,04---------->0,02
=> VH2 = 0,02.22,4 = 0,448 (l)
c) mHCl = 0,04.36,5 = 1,46 (g)