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Question

Balance the following chemical equations and identify the type of chemical reaction.

(a) Mg(s)+Cl2(g)MgCl2(s)
(b) HgO(s)HeatHg(l)+O2(g)
(c) Na(s)+S(s)FuseNa2S(s)
(d) TiCl4(l)+Mg(s)Ti(s)+MgCl2(s)
(e) CaO(s)+SiO2(s)CaSiO3(s)
(f) H2O2(l)UVH2O(l)+O2(g)

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Solution

(a) Mg(s)+Cl2(g)MgCl2(s) Already balanced; Combination reaction
(b) 2HgO (s)Heat2Hg (l)+O2(g); Decomposition reaction
(c) 2Na (s)+S (s)FuseNa2S (s); Combination reaction
(d) TiCl4(l)+2Mg (s)Ti (s)+2MgCl2(s); Displacement reaction
(e) CaO(s)+SiO2(s)CaSiO3(s) Already balanced; Combination reaction
(f) 2H2O2(l)UV2H2O (l)+O2(g); Decomposition reaction

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