要除去MgCl2酸性溶液中少量的FeCl3,不宜选用的试剂是( ) A.MgO B.MgCO3 C.NaOH D.Mg(OH)2
要除去MgCl2酸性溶液中少量的FeCl3,不宜选用的试剂是( )
A. MgO
B. MgCO3
C. NaOH
D. Mg(OH)2
A. MgO
B. MgCO3
C. NaOH
D. Mg(OH)2
其他人气:482 ℃时间:2019-11-24 06:04:58
优质解答
FeCl3易水解生成氢氧化铁,加入Mg(OH)2粉末、MgO或MgCO3,调节溶液的pH,促进铁离子的水解,且不引入新的杂质,故选:C.
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