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1)\(Mg\left(OH\right)_2\underrightarrow{t^o}MgO+H_2O\)

2)\(MgO+H_2SO_4\rightarrow MgSO_4+H_2O\)

3)\(MgSO_4+BaCl_2\rightarrow MgCl_2+BaSO_4\downarrow\)

4)\(MgCl_2+2AgNO_3\rightarrow Mg\left(NO_3\right)_2+2AgCl\downarrow\)

5)\(MgSO_4+Ba\left(OH\right)_2\rightarrow BaSO_4\downarrow+Mg\left(OH\right)_2\downarrow\)

\(\left(1\right)Zn+H_2SO_4\rightarrow ZnSO_4+H_2\\ \left(2\right)ZnSO_4+BaCl_2\rightarrow ZnCl_2+BaSO_4\\ \left(3\right)ZnCl_2+2NaOH\rightarrow Zn\left(OH\right)_2+2NaCl\\ \left(4\right)Zn\left(OH\right)_2\rightarrow^{t^o}ZnO+H_2O\)

2Mg+O2--> 2MgO(1)

MgO+2HCl-->MgCl2+H2O(2)

MgCl2+2NaOH--> Mg(OH)2+2NaCl(3)

Mg(OH)2+CuSO4-->MgSO4+Cu(OH)2(4)

MgSO4+Ba(NO3)2-->Mg(NO3)2+BaSO4(5)

CuO+H2SO4-->CuSO4+H2O(1)

CuSO4+2NaOH-->Cu(OH)2+Na2SO4(2)

Cu(OH)2+2HCl-->CuCl2+2H2O(3)

CuCl2+2AgNO3-->Cu(NO3)2+2AgCl(4)
Cu(NO3)2+Mg-->Mg(NO3)2+Cu(5)

\(a)C+O_2\xrightarrow[]{t^0}CO_2\\ CO_2+2NaOH\rightarrow Na_2CO_3+H_2O\\ Na_2CO_3+H_2SO_4\rightarrow Na_2SO_4+CO_2+H_2O\\ b)FeSO_4+BaCl_2\rightarrow FeCl_2+BaSO_4\\ FeCl_2+2NaOH\rightarrow Fe\left(OH\right)_2+2NaCl\\ Fe\left(OH\right)_2\xrightarrow[]{t^0}FeO+H_2\\ c)2Mg+O_2\xrightarrow[]{t^0}2MgO\\ MgO+H_2SO_4\rightarrow MgSO_4+H_2O\\ MgSO_4+BaCl_2\rightarrow MgCl_2+BaSO_4\)

a)

$CaCO_3 \xrightarrow{t^o} CaO + CO_2$
$CaO + H_2O \to Ca(OH)_2$
$Ca(OH)_2 + 2HCl \to CaCl_2 + 2H_2O$
$CaCl_2 + 2AgNO_3 \to Ca(NO_3)_2 + 2AgCl$

b)

$2Mg + O_2 \xrightarrow{t^o} 2MgO$
$MgO + 2HCl \to MgCl_2 + H_2O$
$MgCl_2 + 2KOH \to Mg(OH)_2 + 2KCl$
$Mg(OH)_2 + H_2SO_4 \to MgSO_4 + 2H_2O$

a) Fe+Cl3\(\rightarrow\)FeCl3

FeCl3+3NaOH\(\rightarrow\) Fe(OH)3\(\downarrow\)+3NaCl

2Fe(OH)3\(\underrightarrow{t^o}\) Fe2O3+3H2O

Fe2O3+3H2\(\underrightarrow{t^o}\) 3Fe+3H2O

Fe+2HCl\(\rightarrow\) FeCl2+H2

b)2Mg+O2\(\underrightarrow{t^0}\) 2MgO

MgO+H2SO4\(\rightarrow\) MgSO4+H2O

MgSO4+Ba(NO3)2\(\rightarrow\) BaSO4\(\downarrow\) Mg(NO3)2

Mg(NO3)2+2NaOH\(\rightarrow\) Mg(OH)2\(\downarrow\) 2NaNO3

Mg(OH)2+2HCl\(\rightarrow\) MgCl2+2H2O

c) ý này giống ý b thôi bạn.

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