cân bằng phương trình hóa học
\(Co_2+NaOH\rightarrow Na_2Co_3+H_2O\)
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$\rm k)2KMnO_4 \xrightarrow{t^o} K_2MnO_4 + MnO_2 + O_2 \uparrow$
$\rm l)CH_4 + 2O_2 \xrightarrow{t^o} CO_2 + 2H_2O$
$\rm m)2Al + 3H_2SO_4 \rightarrow Al_2(SO_4)_3 + 3H_2 \uparrow$
$\rm n)Na_2CO_3 + CaCl_2 \rightarrow CaCO_3 \downarrow + 2NaCl$
$\rm o)2Na + 2H_2O \rightarrow 2NaOH + H_2 \uparrow$
$\rm p)CaO + 2HNO_3 \rightarrow Ca(NO_3)_2 + H_2O$
$\rm q)P_2O_5 + 3H_2O \rightarrow 2H_3PO_4$
$\rm r)Zn + 2HCl \rightarrow ZnCl_2 + H_2 \uparrow$
$\rm s)4Al + 3O_2 \xrightarrow{t^o} 2Al_2O_3$
$\rm t)Ba(OH)_2 + 2HCl \rightarrow BaCl_2 + 2H_2O$
a) \(3Fe+2O_2\rightarrow Fe_3O_4\)
b) \(Fe_3O_4+8HCl\rightarrow FeCl_2+2FeCl_3+4H_2O\)
c) \(2NaHCO_3\rightarrow Na_2CO_3+CO_2+H_2O\)
d) \(2C_2H_2+5O_2\rightarrow4CO_2+2H_2O\)
a) \(N_2+O_2\rightarrow2NO\)
\(\begin{matrix}N^0\rightarrow N^{+2}+2e\\O^0+2e\rightarrow O^{-2}\end{matrix}|\begin{matrix}\times1\\\times1\end{matrix}\)
b) \(C_2H_5OH+3O_2\rightarrow2CO_2+3H_2O\)
\(\begin{matrix}C^{-2}\rightarrow C^{+4}+6e\\O^0+2e\rightarrow O^{-2}\end{matrix}|\begin{matrix}\times1\\\times3\end{matrix}\)
c) \(CH_4+2O_2\rightarrow CO_2+2H_2O\)
\(\begin{matrix}C^{-4}\rightarrow C^{+4}+8e\\O^0+2e\rightarrow O^{-2}\end{matrix}|\begin{matrix}\times1\\\times4\end{matrix}\)
d) \(2H_2S+3O_2\rightarrow2H_2O+2SO_2\)
\(\begin{matrix}S^{-2}\rightarrow S^{+4}+6e\\O^0+2e\rightarrow O^{-2}\end{matrix}|\begin{matrix}\times1\\\times3\end{matrix}\)
e) \(4NH_3+3O_2\rightarrow2N_2+6H_2O\)
\(\begin{matrix}N^{-3}\rightarrow N^0+3e\\O^0+2e\rightarrow O^{-2}\end{matrix}|\begin{matrix}\times2\\\times3\end{matrix}\)
a)N2+O2->2NO
b)C2H5OH+3O2->2CO2+3H2O
c)CH4+2O2->CO2+2H2O
d)H2S+3/2O2->H2O+SO2 / 2H2S+3O2->2H2O+2SO2
e)2NH3+3/2O2->N2+3H2O / 4NH3+3O2->2N2+6H2O
CHÚC BN HỌC TỐT :))))
\(1) 2Fe(OH)_3 \xrightarrow{t^o} Fe_2O_3 + 3H_2O\\ 2) Na_2O + H_2SO_4 \to Na_2SO_4 + H_2O\\ 3) ZnO + H_2SO_4 \to ZnSO_4 + H_2O\\ 4) NaOH + HCl \to NaCl + H_2O\\ 5) 2NaOH + CO_2 \to Na_2CO_3 + H_2O\\ 6) Mg + 2HCl \to MgCl_2 + H)2\\ 7) Cu + 2AgNO_3 \to Cu(NO_3)_2 + 2Ag\\ 8) 2K + S \xrightarrow{t^o} K_2S\)
1, $2Fe(OH)_3\xrightarrow{t^o} Fe_2O_3+3H_2O$
2, $H_2SO_4+2NaOH\to Na_2SO_4+2H_2O$
3, $H_2SO_4+Zn(OH)_2\to ZnSO_4+2H_2O$
4, $NaOH+HCl\to NaCl+H_2O$
5, $2NaOH+CO_2\to Na_2CO_3+H_2O$
6, $Mg+2HCl\to MgCl_2+H_2$
7, $Cu+2AgNO_3\to Cu(NO_3)_2+2Ag$
8, $2K+S\xrightarrow{t^o} K_2S$
\(CH_3C^{-1}H_2OH+Cr^{+7}_2O_7+H^+\rightarrow CH_3C^{+1}HO+Cr^{3+}+H_2O\)
\(C^{-1}\rightarrow C^{+1}+2e|\times4\)
\(2Cr^{+7}+8e\rightarrow2Cr^{+3}|\times1\)
→ \(4CH_3CH_2OH+Cr_2O_7+6H^+\rightarrow4CH_3CHO+2Cr^{+3}+7H_2O\)
CH4 | + | 2O2 | → | 2H2O | + | CO2 |
(khí) | (khí) | (lỏng) | (khí) | |||
(không màu) | (không màu) | (không màu) | (không màu) |
1) \(\overset{+2}{Fe}\overset{-1}{S_2}+\overset{0}{O_2}\rightarrow\overset{+3}{Fe_2}\overset{-2}{O_3}+\overset{+4}{S}\overset{-2}{O_2}\)
quá trình OXH :\(\overset{+2}{Fe}\overset{-1}{S_2}\rightarrow\overset{+3}{Fe}+\overset{+4}{2S}+11e|\times4\)
quá trình khử : \(\overset{0}{2O}+2.2e\rightarrow\overset{-2}{2O}|\times11\)
\(\Rightarrow4FeS_2+11O_2\rightarrow2Fe_2O_3+8SO_2\)2) \(\overset{+2}{Fe}\overset{-2}{S}+H\overset{+5}{N}O_3\rightarrow\overset{+3}{Fe}\left(\overset{+5}{N}O_3\right)_3+\overset{+2}{N}\overset{-2}{O}+H_2O+H_2\overset{+6}{S}O_4\)
quá trình OXH : \(\overset{+2}{Fe}\overset{-2}{S}\rightarrow\overset{+3}{Fe}+\overset{+6}{S}+9e|\times1\)
quá trình khử : \(\overset{+5}{N}+3e\rightarrow\overset{+2}{N}|\times3\)
\(\Rightarrow FeS+6HNO_3\rightarrow Fe\left(NO_3\right)_3+3NO+2H_2O+H_2SO_4\)
CÒN ĐỂ CHIỀU MK LM CHO NHA
1 2 1 1
\(CO_2+2NaOH\rightarrow Na_2CO_3+H_2O\)