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1.\(Fe_xO_y+2yHCl-->xFeCl_{\dfrac{2y}{x}}+yH_2O\)
2.\(2C_xH_y+\left(\dfrac{4x+y}{2}\right)O_2-->2xCO_2+yH_2O\)
3.\(C_nH_{2n}+\dfrac{3n}{2}O_2-->nCO_2+nH_2O\)
4.\(C_nH_{2n+2}+\left(\dfrac{3n+1}{2}\right)O_2-->nCO_2+\left(n+1\right)H_2O\)
5. \(2C_xH_yO_z+\left(\dfrac{4x+y-2z}{2}\right)O_2-->2xCO_2+yH_2O\)
6. (pthh này giống pt 3)
Câu 1:
a) \(C_4H_9OH+6O_2\xrightarrow[]{t^o}4CO_2+5H_2O\)
b) \(2C_nH_{2n-2}+\left(3n-1\right)O_2\xrightarrow[]{t^o}2nCO_2+\left(2n-2\right)H_2O\)
c) \(2Al+6H_2SO_{4\left(đ\right)}\xrightarrow[]{t^o}Al_2\left(SO_4\right)_3+3SO_2\uparrow+6H_2O\)
Câu 2:
Ta có: \(\left\{{}\begin{matrix}n_{Fe}=\dfrac{11,2}{56}=0,2\left(mol\right)\\n_{Mg}=\dfrac{2,4}{24}=0,1\left(mol\right)\end{matrix}\right.\)
Bảo toàn nguyên tố: \(\left\{{}\begin{matrix}n_{Fe_2O_3}=\dfrac{1}{2}n_{Fe}=0,1\left(mol\right)\\n_{MgO}=n_{Mg}=0,1\left(mol\right)\end{matrix}\right.\)
\(\Rightarrow m_{rắn}=m_{Fe_2O_3}+m_{MgO}=0,1\cdot160+0,1\cdot40=20\left(g\right)\)
Câu 3:
a) PTHH: \(CuO+H_2\xrightarrow[]{t^o}Cu+H_2O\) (1)
\(Fe_2O_3+3H_2\xrightarrow[]{t^o}2Fe+3H_2O\) (2)
\(Fe+2HCl\rightarrow FeCl_2+H_2\uparrow\) (3)
b) Ta có: \(n_{H_2\left(3\right)}=\dfrac{2,24}{22,4}=0,1\left(mol\right)=n_{Fe}\) \(\Rightarrow m_{Cu}=12-0,1\cdot56=6,4\left(g\right)\) \(\Rightarrow n_{Cu}=0,1\left(mol\right)\)
Theo các PTHH: \(\left\{{}\begin{matrix}n_{CuO}=n_{Cu}=0,1\left(mol\right)\\n_{Fe_2O_3}=\dfrac{1}{2}n_{Fe}=0,05\left(mol\right)\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}m_{CuO}=0,1\cdot80=8\left(g\right)\\m_{Fe_2O_3}=0,05\cdot160=8\left(g\right)\end{matrix}\right.\)
\(\Rightarrow\%m_{CuO}=\dfrac{8}{8+8}\cdot100\%=50\%=\%m_{Fe_2O_3}\)
c) Theo các PTHH: \(n_{H_2}=n_{CuO}+3n_{Fe_2O_3}=0,1+0,15=0,25\left(mol\right)\)
\(\Rightarrow V_{H_2}=0,25\cdot22,4=5,6\left(l\right)\)
`2NaOH + CO_2 -> Na_2CO_3 + H_2O`
`BaCO_3 + 2HCl -> BaCl_2 + CO_2 + H_2O`
`3AgNO_3 + K_3PO_4 -> Ag_3PO_4 + 3KNO_3`
`FeS + 2HCl -> FeCl_2 + H_2S`
`Mg(OH)_2 + 2HCl -> MgCl_2 + 2H_2O`
$C_nH_{2n} + \dfrac{3n}{2} O_2 \xrightarrow{t^o} nCO_2 + nH_2O$
$C_nH{2n+2} + \dfrac{3n+1}{2} O_2 \xrightarrow{t^o} nCO_2 + (n+1)H_2O$
`Fe_xO_y + 2yHCl -> FeCl_{2y//x} + yH_2O`
`2M + 2nH_2SO_4 -> M_2(SO_4)_n + nSO_2 + 2nH_2O`
\(a.3Fe+2O_2\overset{t^o}{--->}Fe_3O_4\)
\(b.3NaOH+AlCl_3--->3NaCl+Al\left(OH\right)_3\downarrow\)
\(c.2K+2H_2O--->2KOH+H_2\uparrow\)
\(d.2KMnO_4\overset{t^o}{--->}K_2MnO_4+MnO_2+O_2\uparrow\)
\(e.2C_nH_{2n}+3nO_2\overset{t^o}{--->}2nCO_2\uparrow+2nH_2O\)
\(g.2FeCl_x+xBa\left(OH\right)_2--->xBaCl_2+2Fe\left(OH\right)_x\downarrow\)
\(C_nH_{2n}+\dfrac{3n}{2}O_2\underrightarrow{^{^{t^0}}}nCO_2+nH_2O\)
\(C_nH_{2n+2}+\dfrac{3n+1}{2}O_2\underrightarrow{^{^{t^0}}}nCO_2+\left(n+1\right)H_2O\)
cảm ơn a