在下列溶液中,各组离子一定能够大量共存的是 A.使酚酞试液变红

在下列溶液中,各组离子一定能够大量共存的是

A.使酚酞试液变红的溶液: Na+、Cl-、SO42-、Fe3+

B.使紫色石蕊试液变红的溶液:Fe2+、Mg2+、NO3-、Cl-

C.c(H+)=10-12 mol·L-1的溶液:K+、Ba2+、Cl-、Br-

D.碳酸氢钠溶液:K+、SO42-、Cl-、H+

答案

C

相关题目

若|x﹣3|+(y+2)2=0,则5x2﹣(x﹣3y)= .
若|x﹣3|+(y+2)2=0,则5x2﹣(x﹣3y)= .
在由水电离产生的H+浓度为1×10-13mol・L-1的溶液中,一定
在由水电离产生的H+浓度为1×10-13mol・L-1的溶液中,一定能大量共存的离子组是(   ) ① K+、Cl、NO3、S2  ② K+、Fe2+、I、SO42  ③ Na+、Cl-、N
 ----_______Mary come and play computer games? ---No, _______she has finished
 ----_______Mary come and play computer games? ---No, _______she has finished her homework. A. Will, when      B. Shall, once    C. Would, if       D. Shall, unless
下列词语中加点的字,每对的读音全都相同的一项是( ) A.
下列词语中加点的字,每对的读音全都相同的一项是( ) A.揾泪/汶川 什邡/牌坊 数典忘祖/数一数二 B.畸形/羁绊 缥缈/剽窃 模棱两可/装模作样 C.殷红
下列各函数中,随增大而增大的是( )①. ②(x < 0) ③
下列各函数中,随增大而增大的是( )①. ②(x < 0) ③. ④A.①②B.②③C.②④D.①③
The most important thing about cotton in history is ____ part that it played in
The most important thing about cotton in history is ____ part that it played in ____ Industrial Revolution. A. / ; /         B. the ; /      C. the ; the      D. a ; the  
—What did your father ask you?     —He asked me ___________.A.whom I
—What did your father ask you?     —He asked me ___________.A.whom I was chatting withB.where am I with my friendsC.when would I go homeD.if I have finished my homework
下列关于动物机体中的酶、递质和激素的叙述,正确的是   
下列关于动物机体中的酶、递质和激素的叙述,正确的是   (    )        A.酶、递质和激素发挥作用后均失去活性        B.能产生激素的

最新题目