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Balance the following equations:(i) Na + O2 ----> Na2O(ii) H2O2 ----> H2O + O2(iii) Mg(OH)2 + HCl ----> MgCl2 + H2O(iv) Fe + O2 ----> Fe2O3(v) Al(OH)3 ----> Al2O3 + H2O(vi) NH3 + CuO ----> Cu + N2 + H2O(vii) Al2(SO4)3 + NaOH ----> Al(OH)3 + Na2SO4(viii) HNO3 + Ca(OH)2 ----> Ca(NO3)2 + H2O(ix) NaOH + H2SO4 ----> Na2SO4 + H2O(x) BaCl2 + H2SO4 ----> BaSO4 + HCl
Balanced equations for the following are given below:
(i) Na + O2 ----> Na2O
$4Na\ +\ O_{2} \ \rightarrow \ \ 2Na_{2} O$
(ii) H2O2 ----> H2O + O2
$2H_{2} O_{2} \ \rightarrow \ 2H_{2} O\ +\ O_{2}$
(iii) Mg(OH)2 + HCl ----> MgCl2 + H2O
$Mg( OH)_{2} \ +\ 2HCl\ \rightarrow \ MgCl_{2} \ +\ 2H_{2} O$
(iv) Fe + O2 ----> Fe2O3
$4Fe\ +\ 3O_{2} \ \rightarrow \ \ 2Fe_{2} O_{3}$
(v) Al(OH)3 ----> Al2O3 + H2O
$2Al( OH)_{3\ }\rightarrow \ Al_{2} O_{3} \ +\ 3H_{2} O$
(vi) NH3 + CuO ----> Cu + N2 + H2O
$2NH_{3} \ +\ 3CuO\ \rightarrow \ 3Cu\ +\ N_{2\ } +\ 3H_{2} O$
(vii) Al2(SO4)3 + NaOH ----> Al(OH)3 + Na2SO4
$Al_{2}( SO_{4})_{3} \ +\ 6NaOH\ \rightarrow \ 2Al( OH)_{3} \ +\ 3Na_{2} SO_{4}
$
(viii) HNO3 + Ca(OH)2 ----> Ca(NO3)2 + H2O
$2HNO_{3} \ +\ Ca( OH)_{2}\rightarrow \ \ Ca( NO_{3})_{2} \ +\ 2H_{2} O$
(ix) NaOH + H2SO4 ----> Na2SO4 + H2O
$2NaOH\ +\ H_{2} SO_{4\ }\rightarrow \ Na_{2} SO_{4} \ +\ 2H_{2} O$
(x) BaCl2 + H2SO4 ----> BaSO4 + HCl
$BaCl_{2} \ +\ H_{2} SO_{4} \ \rightarrow \ BaSO_{4} \ +\ 2HCl$
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