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\(n_{Zn}=\dfrac{26}{65}=0,4\left(mol\right)\\ pthh:Zn+2HCl\rightarrow ZnCl_2+H_2\uparrow\)
0,4 0,8 0,4 0,4
\(a,V_{H_2}=0,4.22,4=8,96\left(l\right)\\ b,C\%_{HCl}=\dfrac{0,8.36,5}{150}.100\%=19,5\%\\ c,m_{\text{dd}}=26+150-\left(0,4.2\right)=175,2\left(g\right)\\ C\%_{ZnCl_2}=\dfrac{0,4.136}{175,2}.100\%=31\%\)
`n_[Zn]=13/65=0,2(mol)`
`Zn + 2HCl -> ZnCl_2 + H_2 \uparrow`
`0,2` `0,4` `0,2` `(mol)`
`a)V_[H_2]=0,2.22,4=4,48(l)`
`b)C%_[HCl]=[0,4.36,5]/150 .100~~9,73%`
`a)PTHH:`
`2Al + 6HCl -> 2AlCl_3 + 3H_2`
`0,2` `0,6` `0,3` `(mol)`
`n_[Al]=[5,4]/27=0,2(mol)`
`b)V_[H_2]=0,3.22,4=6,72(l)`
`c)m_[dd HCl]=[0,6.36,5]/10 . 100 =219(g)`
1)
a) Fe + 2HCl --> FeCl2 + H2
b) \(n_{Fe}=\dfrac{8,4}{56}=0,15\left(mol\right)\)
PTHH: Fe + 2HCl --> FeCl2 + H2
0,15->0,3--->0,15-->0,15
=> VH2 = 0,15.22,4 = 3,36 (l)
c) mdd sau pư = 8,4 + 250 - 0,15.2 = 258,1 (g)
=> \(C\%_{FeCl_2}=\dfrac{0,15.127}{258,1}.100\%=7,38\%\)
2)
a) Zn + 2HCl --> ZnCl2 + H2
b) \(n_{Zn}=\dfrac{13}{65}=0,2\left(mol\right)\)
PTHH: Zn + 2HCl --> ZnCl2 + H2
0,2-->0,4---->0,2--->0,2
=> VH2 = 0,2.22,4 = 4,48 (l)
mZnCl2 = 0,2.136 = 27,2 (g)
c) \(C_{M\left(dd.HCl\right)}=\dfrac{0,4}{0,2}=2M\)
d)
PTHH: A + 2HCl --> ACl2 + H2
0,2<--0,4
=> \(M_A=\dfrac{4,8}{0,2}=24\left(g/mol\right)\)
=> A là Mg(Magie)
\(n_{Fe}=\dfrac{8,4}{56}=0,15\left(mol\right)\\ Fe+2HCl\rightarrow FeCl_2+H_2\\ n_{FeCl_2}=n_{H_2}=n_{Fe}=0,15\left(mol\right)\\ n_{HCl}=0,15.2=0,3\left(mol\right)\\ a,m_{FeCl_2}=127.0,15=19,05\left(g\right)\\ b,V_{H_2\left(đktc\right)}=0,15.22,4=3,36\left(l\right)\\ c,C_{MddHCl}=\dfrac{0,3}{0,02}=15\left(M\right)\)
\(n_{Zn}=\dfrac{13}{65}=0,2\left(mol\right)\\ n_{HCl}=\dfrac{109,5.20\%}{36,5}=0,6\left(mol\right)\\ PTHH:Zn+2HCl\rightarrow ZnCl_2+H_2\\ Vì:\dfrac{0,2}{1}< \dfrac{0,6}{2}\Rightarrow HCldư\\ n_{H_2}=n_{ZnCl_2}=n_{Zn}=0,2\left(mol\right)\\ n_{HCl\left(dư\right)}=0,6-0,2.2=0,2\left(mol\right)\\ a,V_{H_2\left(đktc\right)}=0,2.22,4=4,48\left(l\right)\\ b,m_{ZnCl_2}=136.0,2=27,2\left(g\right)\\ c,m_{ddsau}=13+109,5-0,2.2=122,1\left(g\right)\\ C\%_{ddZnCl_2}=\dfrac{27,2}{122,1}.100\approx22,277\%\\ C\%_{ddHCl\left(dư\right)}=\dfrac{0,2.36,5}{122,1}.100\approx5,979\%\)
Zn + 2HCl -> ZnCl2 + H2
a, nZn = 13/65= 0,2(mol)
mHCl= 109,5.20%/100%=21.9(g)
nHCl=21,9/36,5=0,6(mol)
Theo PT nHCl = 2nZn= 2.0,2= 0,4(mol)<0,6(mol)
=> HCl pư dư, Zn pư hết
Theo PT: nH2= nZn =0,2(mol)
VH2=0,2.22,4=4,48(l)
b, Theo PT: nZnCl2=nZn=0,2(mol)
mZnCl2= 0,2.136=27,2(g)
c, mdd sau pư= 13+109,5-0,2.2=122,1(g)
C%dd ZnCl2=27,2.100%/122,1=22,28%
nHCl dư= 0,6-0,4=0,2(mol)
mHcl
nAl = 5.4 / 27 = 0.2 (mol)
2Al + 6HCl => 2AlCl3 + 3H2
0.2......0.6............0.2.......0.3
a) VH2 = 0.3 * 22.4 = 6.72 (l)
b) mAlCl3 = 0.2 * 133.5 = 26.7 (g)
c) VddHCl = 0.6 / 1.5 = 0.4 (l)
d) CMAlCl3 = 0.2 / 0.4 = 0.5 (M)
PTHH: \(2Al+6HCl\rightarrow2AlCl_3+3H_2\uparrow\)
Ta có: \(n_{Al}=\dfrac{5,4}{27}=0,2\left(mol\right)\)
\(\Rightarrow\left\{{}\begin{matrix}n_{HCl}=0,6\left(mol\right)\\n_{AlCl_3}=0,2\left(mol\right)\\n_{H_2}=0,3\left(mol\right)\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}V_{H_2}=0,3\cdot22,4=6,72\left(l\right)\\m_{AlCl_3}=0,2\cdot133,5=26,7\left(g\right)\\V_{HCl}=\dfrac{0,6}{1,5}=0,4\left(l\right)=400\left(ml\right)\\C_{M_{AlCl_3}}=\dfrac{0,2}{0,4}=0,5\left(M\right)\end{matrix}\right.\)
`a)PTHH:`
`Zn + 2HCl -> ZnCl_2 + H_2`
`0,2` `0,4` `0,2` `0,2` `(mol)`
`n_[Zn]=13/65=0,2(mol)`
`b)V_[H_2]=0,2.22,4=4,48(l)`
`c)m_[dd HCl]=[0,4.36,5]/5 . 100=292(g)`
`=>C%_[ZnCl_2]=[0,2.136]/[13+292-0,2.2].100~~8,93%`
\(n_{Al}=\dfrac{10,8}{27}=0,4\left(mol\right)\)
PTHH :
\(2Al+6HCl\rightarrow2AlCl_3+3H_2\uparrow\)
0,4 1,2 0,4 0,6
\(a,V_{H_2}=0,6.22,4=13,44\left(l\right)\)
\(b,m_{HCl}=1,2.36,5=43,8\left(g\right)\)
\(c,m_{AlCl_3}=133,5.0,4=53,4\left(g\right)\)
\(m_{ddHCl}=\dfrac{43,8.100}{10}=438\left(g\right)\)
\(m_{ddAlCl_3}=10,8+438-\left(0,6.2\right)=447,6\left(g\right)\)
\(C\%=\dfrac{53,8}{447,6}.100\%\approx12,02\%\)