游客
题文

能在溶液中大量共存的一组离子是

A. NH4+Ag+PO43-Cl- B. Fe3+H+I-HCO3-
C. K+Na+NO3- MnO4- D. Al3+Mg2+SO42-CO32-
科目 化学   题型 选择题   难度 容易
知识点: 离子共存问题
登录免费查看答案和解析
相关试题

在一定温度下,反应 1/2 H 2 (g)+1/2 X 2 (g) HX(g) 的平衡常数为10。若将1.0 mol HX(g) 通入体积为1.0 L 的密闭容器中,在该温度时 HX(g) 的最大分解率接近于

A. 5% B. 17% C. 25% D. 33%

Now that we’ve discussed our problem, are people happy with the decisions _______?

A.taking B.take C.taken D.to take

Everybody was touched _____ words after they heard her moving story.

A.beyond B.without C.of D.in

One of the most important questions they had to consider was _____ of public health.

A.what B.this
C.that D.which

Encourage your children to try new things, but try not to ___ them too hard.

A.draw B.strike C.rush D.push

Copyright ©2020-2025 优题课 youtike.com 版权所有

粤ICP备20024846号