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中学化学主要实验的现象描述汇总
43.加热盛有固体氯化铵的试管: NH4Cl=(Δ)NH3↑+HCl↑ 试管底部固体减少 ... 89.氯化铝与过量氢氧化钠溶液反应: AlCl3+3NaOH=Al(OH)3↓+3NaCl Al(OH)3+NaOH=NaAlO2+2H2O 先生成白色絮状沉淀,氢氧化钠过量后,白色沉淀消失。 先没有沉淀,后才有白色絮状沉淀。
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