右图为实验室制氢气的简易装置若在加稀硫酸时�现锌粒与稀硫酸没有接触而稀硫酸不够了为使该反应顺利进行可以从长颈漏斗中加入的试剂是 �食盐 Template




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tomski右图为实验室制氢气的简易装置若在加稀硫酸时�现锌粒与稀硫酸没有接触而稀硫酸不够了为使该反应顺利进行可以从长颈漏斗中加入的试剂是 �食盐 coloring