Question

[Nguyễn Hoàng Nam]

Cho các bazơ sau: $\mathrm{LiOH}, \mathrm{NaOH}, \mathrm{KOH}, \mathrm{Ca}{\left(\mathrm{OH}\right)}_2,$ $\mathrm{Mg}{\left(\mathrm{OH}\right)}_2, \mathrm{Al}{\left(\mathrm{OH}\right)}_3, \mathrm{Fe}{\left(\mathrm{OH}\right)}_3$. Dãy bazơ tan trong nước tạo thành dung dịch kiềm là:

A. $\mathrm{Ca}{\left(\mathrm{OH}\right)}_2, \mathrm{LiOH}, \mathrm{Cu}{\left(\mathrm{OH}\right)}_2, \mathrm{Mg}{\left(\mathrm{OH}\right)}_2$

B. $\mathrm{Ca}{\left(\mathrm{OH}\right)}_2, \mathrm{KOH}, \mathrm{LiOH}, \mathrm{NaOH}$

C. $\mathrm{KOH}, \mathrm{LiOH}, \mathrm{NaOH}, \mathrm{Al}{\left(\mathrm{OH}\right)}_3$

D. $\mathrm{Al}{\left(\mathrm{OH}\right)}_3, \mathrm{NaOH}, \mathrm{Mg}{\left(\mathrm{OH}\right)}_2, \mathrm{KOH}$

Answer 1

[Ngô Quang Sinh]

chọn B

Chỉ có 5 bazơ tan trong nước tạo ra dung dịch bazơ là: LiOH ,   NaOH ,   KOH ,   Ba ( OH ) 2 ,   Ca ( OH ) 2 .