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\(n_{HCl}=0,5.0,2=0,1\left(mol\right)\)
Pt : \(Fe+2HCl\rightarrow FeCl_2+H_2\)
0,05<--0,1----->0,05--->0,05
\(m_{Fe}=0,05.56=2,8\left(g\right)\)
\(m_{FeCl2}=0,05.127=6,35\left(g\right)\)
\(V_{H2\left(dktc\right)}=0,05.22,4=1,12\left(l\right)\)
\(V_{H2\left(dkc\right)}=0,05.24,79=1,2395\left(l\right)\)
\(n_{Fe}=\dfrac{14}{56}=0,25\left(mol\right)\\
pthh:Fe+H_2SO_4\rightarrow FeSO_4+H_2\)
0,25 0,25 0,25
=> \(V_{H_2}=0,25.22,4=5,6\left(l\right)\)
\(m_{FeSO_4}=152.0,25=38\left(g\right)\)
\(pthh:CuO+H_2\underrightarrow{t^o}H_2O+Cu\)
0,25 0,25 0,25
=> \(m_{Cu}=0,25.64=16\left(g\right)\)
nFe = 14/56 =0,25 mol
PTHH : Fe + H2SO4 => FeSO4 + H2 (1)
Theo pt(1) : nH2 = nFe = 0,25 mol
VO2 = 0,25 x 22,4 = 5,6 l
Theo pt(1): nFeSO4 = nFe = 0,25 mol
mFeSO4= 0,25 x 152 = 38 g
PTHH : H2 + CuO => Cu + H2O(2)
theo pt (2) => nH2 = nCu = 0,25 mol
mCu = 0,25 x 64 = 16 g
Ta có: \(n_{Mg}=\dfrac{2,4}{24}=0,1\left(mol\right)\)
PT: \(Mg+2HCl\rightarrow MgCl_2+H_2\)
_____0,1_____0,2___________0,1 (mol)
a, \(V_{H_2}=0,1.24,79=2,479\left(l\right)\)
b, \(C_{M_{HCl}}=\dfrac{0,2}{1}=0,2\left(M\right)\)
a) Mg + 2HCl --> MgCl2 + H2
b) \(n_{Mg}=\dfrac{4,8}{24}=0,2\left(mol\right)\)
PTHH: Mg + 2HCl --> MgCl2 + H2
0,2--->0,4-------------->0,2
=> mHCl = 0,4.36,5 = 14,6 (g)
c) \(V_{H_2}=0,2.22,4=4,48\left(l\right)\)
d)
PTHH: CuO + H2 --to--> Cu + H2O
0,2------->0,2
=> mCu = 0,2.64 = 12,8 (g)
\(a\)) \(PTHH:Zn+2HCl\underrightarrow{t^o}ZnCl_2+H_2\)
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) \(m_{HCl}=n.M=0,5.36,5=18,25\left(g\right)\)
\(n_{Zn}=\dfrac{13}{65}=0,2(mol)\\ a,Zn+2HCl\to ZnCl_2+H_2\\ \Rightarrow n_{H_2}=0,2(mol);n_{HCl}=0,4(mol)\\ b,m_{HCl}=0,4.36,5=14,6(g)\\ c,V_{H_2}=0,2.24,79=4,958(l)\)
a, \(Zn+2HCl\rightarrow ZnCl_2+H_2\)
b, \(n_{Zn}=\dfrac{39}{65}=0,6\left(mol\right)\)
Theo PT: \(n_{HCl}=2n_{Zn}=1,2\left(mol\right)\Rightarrow m_{HCl}=1,2.36,5=43,8\left(g\right)\)
c, \(n_{H_2}=n_{Zn}=0,6\left(mol\right)\Rightarrow V_{H_2}=0,6.24,79=14,874\left(l\right)\)
d, - Quỳ tím hóa đỏ do HCl dư.
a)
\(PTHH:Zn+2HCl\rightarrow ZnCl_2+H_2\uparrow\)
b)
\(n_{Zn}=\dfrac{13}{65}=0,2\left(mol\right)\)
Theo PT:\(n_{H_2}=n_{Zn}=0,2mol\)
\(\Rightarrow V_{H_2}=0,2.24,79=4,958l\)
a, \(Zn+2HCl\rightarrow ZnCl_2+H_2\)
b, \(n_{Zn}=\dfrac{13}{65}=0,2\left(mol\right)\)
Theo PT: \(n_{H_2}=n_{Zn}=0,2\left(mol\right)\)
\(\Rightarrow V_{H_2}=0,2.24,79=4,958\left(l\right)\)
a, \(Fe+2HCl\rightarrow FeCl_2+H_2\)
b, Ta có: \(n_{Fe}=\dfrac{5,6}{56}=0,1\left(mol\right)\)
Theo PT: \(n_{FeCl_2}=n_{H_2}=n_{Fe}=0,1\left(mol\right)\)
\(\Rightarrow V_{H_2}=0,1.24,79=2,479\left(l\right)\)
\(m_{FeCl_2}=0,1.127=12,7\left(g\right)\)