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`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)`
a) pt: 2Al + 6HCl \(\rightarrow\) 2AlCl3 + 3H2
nAl = \(\dfrac{5,4}{27}=0,2mol\)
Theo pt: nH2 = \(\dfrac{3}{2}nAl=0,3mol\)
=> VH2 = 0,3.22,4 = 6,72lit
c) nHCl = 3nAl = 0,6mol
=> mHCl = 21,9g
=> C% = \(\dfrac{21,9}{200}.100\%=10,95\%\)
d) Bảo toàn khối lượng
mdung dich muối = mAl + mHCl - mH2
= 5,4 + 200 - 0,3.2 = 204,8g
Theo pt:nAlCl3 = nAl = 0,2mol
=> mAlCl3 = 0,2.133,5 = 26,7g
=> C%dd muối = \(\dfrac{26,7}{204,8}.100\%=13,03\%\)
e) H2 + CuO \(\xrightarrow[]{t^o}\) Cu + H2O
nCu = nH2 = 0,3mol
=> mCu = 0,3.64 = 19,2g
a)
\(PTHH:2Al+6HCl->2AlCl_3+3H_2\)
1,3<---4<-------1,3<---------2
b)
\(n_{H_2\left(dktc\right)}=\dfrac{V}{22,4}=\dfrac{44,8}{22,4}=2\left(mol\right)\)
\(m_{AlCl_3}=n\cdot M=1,3\cdot\left(27+35,5\cdot3\right)=173,55\left(g\right)\)
\(m_{Al}=n\cdot M=1,3\cdot27=35,1\left(g\right)\)
`a)PTHH:`
`Zn + 2HCl -> ZnCl_2 + H_2`
`0,1` `0,2` `0,1` `0,1` `(mol)`
`n_[HCl]=0,2.1=0,2(mol)`
`=>m_[Zn]=0,1.65=6,5(g)`
`b)m_[dd HCl]=1,1.200=220(g)`
`=>C%_[ZnCl_2]=[0,1.136]/[6,5+220-0,1.2].100~~6%`
\(a,n_{HCl}=0,2.1=0,2\left(mol\right)\)
PTHH: \(Zn+2HCl\rightarrow ZnCl_2+H_2\uparrow\)
0,1<--0,2------>0,1------->0,1
\(\rightarrow m_{Zn}=0,1.65=6,5\left(g\right)\)
\(b,m_{ddHCl}=200.1,1=220\left(g\right)\)
\(\rightarrow m_{dd}=220+6,5-0,1.2=226,3\left(g\right)\\ \rightarrow C\%_{ZnCl_2}=\dfrac{0,1.136}{226,3}.100\%=6\%\)
2Al + 6HCl ----> 2AlCl3 + 3H2
0,1-------0,3---------0,1
n Al=0,1 mol
=>m dd HCl=54,75g
=>C% AlCl3=\(\dfrac{0,1.133,5}{2,7+54,75}100=23,23\%\)