题目内容
除去下列各物质中的杂质(括号内为杂质),写出所加试剂(或方法),属离子反应的写出离子方程式.
(1)CO2(HCl)________,__________________________.
(2)KCl(K2CO3)________,________________________.
(3)CO(CO2)________,____________________________.
(4)Cu(CuO)________,____________________________.
(1)CO2(HCl)________,__________________________.
(2)KCl(K2CO3)________,________________________.
(3)CO(CO2)________,____________________________.
(4)Cu(CuO)________,____________________________.
(1)饱和NaHCO3溶液;HCO3-+H+===CO2↑+H2O
(2)稀盐酸;CO32-+2H+===CO2↑+H2O
(3)澄清石灰水;Ca2++2OH-+CO2===CaCO3↓+H2O
(4)稀硫酸;CuO+2H+===Cu2++H2O
(2)稀盐酸;CO32-+2H+===CO2↑+H2O
(3)澄清石灰水;Ca2++2OH-+CO2===CaCO3↓+H2O
(4)稀硫酸;CuO+2H+===Cu2++H2O
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