将饱和FeCl3溶液分别滴入下述液体中,能形成胶体的是 A.冷水     

将饱和FeCl3溶液分别滴入下述液体中,能形成胶体的是

A.冷水                  B.沸水                  C.NaOH浓溶液                   D.NaCl浓溶液

答案

B


解析:

FeCl3在冷水中水解程度小,形不成胶体;FeCl3在NaOH溶液中生成的Fe(OH)3太多,又易形成沉淀;胶体遇电解质也易形成沉淀,故在NaCl浓溶液中也不会形成胶体。

相关题目

  第二卷(共35分) 第四部分:写作(共三节,满分35分)
  第二卷(共35分) 第四部分:写作(共三节,满分35分) 第一节:单词拼写(共5小题,每小题1分,满分5分) 76.Our___             __(祖先) celebra
 ---- Let’s go to a movie after work, OK?        ---- ______ A. Why not
 ---- Let’s go to a movie after work, OK?        ---- ______ A. Why not?            B.      Not at all.     C. Never mind.          D. What of it?
已知质点以速度v(t)=(m/s)在运动,则该质点从时刻t=0到
已知质点以速度v(t)=(m/s)在运动,则该质点从时刻t=0到时刻t=5(s)时所经过的路程为( ) A.20m  B.22m  C.24m  D.26m
离子符号的意义:3Mg2+  中,“2”表示              
离子符号的意义:3Mg2+  中,“2”表示                     ;“3”表示                       
. The best music teacher in the school has hurt his left foot and cannot ______
. The best music teacher in the school has hurt his left foot and cannot ______ tomorrow’s concert.        A. take part         B. play a part in      C. participate in      
 下列现象中,与原子核内部变化有关的是            
 下列现象中,与原子核内部变化有关的是                             A.粒子散射现象           B.天然放射现象 C.光电效应现
 The sports meet, originally due to be held last Friday, was finally _____ beca
 The sports meet, originally due to be held last Friday, was finally _____ because of the bad weather. A. set up            B. broken down           C. worn out        D.
 The boy told his mother that the bike he ______ last month was stolen.    A
 The boy told his mother that the bike he ______ last month was stolen.    A. had repaired            B. has been repaired  C. has repaired         D. was repaired

最新题目