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[思路与方法的应用]
判断下列化学方程式书写是否正确,并将不正确的改正过来。
(1) $\ce{Al + O_{2}\xlongequal{\mathrm{点燃}} AlO_{2}}$
(2) $\ce{HgO\xlongequal{\mathrm{高温}} Hg + O_{2}\uparrow}$
(3) $\ce{3Fe + 2O_{2}\uparrow\xlongequal{\mathrm{点燃}} Fe_{3}O_{4}}$
(4) $\ce{K_{2}MnO_{4}\xlongequal{\mathrm{点燃}} KMnO_{4} + MnO_{2} + O_{2}}$
判断下列化学方程式书写是否正确,并将不正确的改正过来。
(1) $\ce{Al + O_{2}\xlongequal{\mathrm{点燃}} AlO_{2}}$
错误。$\ce{4Al+3O_{2}\xlongequal{点燃}2Al_{2}O_{3}}$
。(2) $\ce{HgO\xlongequal{\mathrm{高温}} Hg + O_{2}\uparrow}$
错误。$\ce{2HgO\xlongequal{\Delta}2Hg+O_{2}\uparrow}$
。(3) $\ce{3Fe + 2O_{2}\uparrow\xlongequal{\mathrm{点燃}} Fe_{3}O_{4}}$
错误。$\ce{3Fe+2O_{2}\xlongequal{点燃}Fe_{3}O_{4}}$
。(4) $\ce{K_{2}MnO_{4}\xlongequal{\mathrm{点燃}} KMnO_{4} + MnO_{2} + O_{2}}$
错误。$\ce{2KMnO_{4}\xlongequal{\Delta}K_{2}MnO_{4}+MnO_{2}+O_{2}\uparrow}$
。答案
(1)错误。$\ce{4Al+3O_{2}\xlongequal{点燃}2Al_{2}O_{3}}$
(2)错误。$\ce{2HgO\xlongequal{\Delta}2Hg+O_{2}\uparrow}$
(3)错误。$\ce{3Fe+2O_{2}\xlongequal{点燃}Fe_{3}O_{4}}$
(4)错误。$\ce{2KMnO_{4}\xlongequal{\Delta}K_{2}MnO_{4}+MnO_{2}+O_{2}\uparrow}$
(2)错误。$\ce{2HgO\xlongequal{\Delta}2Hg+O_{2}\uparrow}$
(3)错误。$\ce{3Fe+2O_{2}\xlongequal{点燃}Fe_{3}O_{4}}$
(4)错误。$\ce{2KMnO_{4}\xlongequal{\Delta}K_{2}MnO_{4}+MnO_{2}+O_{2}\uparrow}$
