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Question

Balance the following equations:
(i) Na + O2 Na2O
(ii) H2O2 H2O + O2
(iii) Mg(OH)2 + HCI 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

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Solution

(i) 4Na + O2 2Na2O

(ii) 2H2O2 2H2O + O2

(iii) Mg(OH)2 + 2HCl MgCl2 + 2 H2O

(iv) 4Fe + 3O2 2Fe2O3

(v) 2Al(OH)3 Al2O3 + 3H2O

(vi) 2NH3 + 3CuO 3Cu + N2 + 3H2O

(vii) Al2(SO4)3 + 6NaOH 2Al(OH)3 + 3Na2SO4

(viii) 2HNO3 + Ca(OH)2 Ca(NO3)2 + 2H2O

(ix) 2NaOH + H2SO4 Na2SO4 + 2H2O

(x) BaCl2 + H2SO4 BaSO4 + 2HCl

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