高中化学除杂总结表序号原物杂质除杂试剂操作1N2O2灼热的铜丝网2Cu+O2=2CuO固转气2CO2H2S饱和NaHCO3溶液NaHCO3+H2S=NaHS+H2O+CO2↑洗气3COCO2氢氧化钠CO2+NaOH=Na2CO3+H2O洗气4CO2CO灼热的氧化铜CuO+CO=Cu+CO2固转气5CO2HCL饱和碳酸氢钠NaHCO3溶液NaHCO3+HCl=NaCl+H2O+CO2↑洗气6H2SHCL饱和硫氢化钠NaHS+HCl=NaCl+H2S洗气7SO2HCL饱和亚硫酸氢钠NaHSO3+HCl=NaCl+H2O+SO2↑洗气8Cl2HCl饱和食盐水，HCl易溶于NaCl中洗气9CO2SO2饱和碳酸氢钠，NaHCO3+SO2=NaHSO3+H2O+CO2↑洗气10碳粉MnO2浓盐酸,MnO2+4HCl(浓)=MnCl2+Cl2↑+2H2O加热过滤11MnO2碳粉C+O2=CO2灼烧12碳粉CuO稀盐酸CuO+2HCl=CuCl2+H2O过滤13Al2O3Fe2O3氢氧化钠（过量,保证Al2O3充分被溶解）,Fe2O3与NaOH不发应，Al2O3+2NaOH=2NaAlO2+H2O,过滤除去氧化铁，向滤液中通入过量的CO2，NaAlO2+CO2+2H2O=Al(OH)3↓+NaHCO3，过滤得到Al(OH)3,然后洗涤,灼烧.反应式：2Al(OH)3=（加热）Al2O3+3H2O。过滤14Fe2O3Al2O3氢氧化钠，HYPERLINK"https://www.baidu.com/s?wd=Al2O3&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1dWrjbkPjb3nH0suAmYujc0IAYqnWm3PW64rj0d0AP8IA3qPjfsn1bkrjKxmLKz0ZNzUjdCIZwsrBtEXh9GuA7EQhF9pywdQhPEUiqkIyN1IA-EUBtdnjfvrjb3n10"\t"_blank"Al2O3是HYPERLINK"https://www.baidu.com/s?wd=%E4%B8%A4%E6%80%A7%E6%B0%A7%E5%8C%96%E7%89%A9&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1dWrjbkPjb3nH0suAmYujc0IAYqnWm3PW64rj0d0AP8IA3qPjfsn1bkrjKxmLKz0ZNzUjdCIZwsrBtEXh9GuA7EQhF9pywdQhPEUiqkIyN1IA-EUBtdnjfvrjb3n10"\t"_blank"两性氧化物，能与强碱溶液反应，往试样里加入足量的NaOH溶液，使其中HYPERLINK"https://www.baidu.com/s?wd=Al2O3&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1dWrjbkPjb3nH0suAmYujc0IAYqnWm3PW64rj0d0AP8IA3qPjfsn1bkrjKxmLKz0ZNzUjdCIZwsrBtEXh9GuA7EQhF9pywdQhPEUiqkIyN1IA-EUBtdnjfvrjb3n10"\t"_blank"Al2O3转化为可溶性HYPERLINK"https://www.baidu.com/s?wd=NaAlO2&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1dWrjbkPjb3nH0suAmYujc0IAYqnWm3PW64rj0d0AP8IA3qPjfsn1bkrjKxmLKz0ZNzUjdCIZwsrBtEXh9GuA7EQhF9pywdQhPEUiqkIyN1IA-EUBtdnjfvrjb3n10"\t"_blank"NaAlO2，然后过滤，洗涤难溶物，即为纯净的HYPERLINK"https://www.baidu.com/s?wd=Fe2O3&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1dWrjbkPjb3nH0suAmYujc0IAYqnWm3PW64rj0d0AP8IA3qPjfsn1bkrjKxmLKz0ZNzUjdCIZwsrBtEXh9GuA7EQhF9pywdQhPEUiqkIyN1IA-EUBtdnjfvrjb3n10"\t"_blank"Fe2O3过滤15Al2O3SiO2盐酸氨水，加入稀盐酸Al2O3+6HCl=2AlCl3+3H2O，过滤去除二氧化硅，向滤液中通入AlCl3+3NH3·H2O=Al(O