下列化学反应的离子方程式正确的是(   ) A、用小苏打治疗胃酸

下列化学反应的离子方程式正确的是(  

A、用小苏打治疗胃酸过多: HCO3- + H+ == CO2↑+ H2O

B、往碳酸镁中滴加稀盐酸: CO32- + 2H+ == CO2↑+ H2O

C、往氨水中滴加氯化铝:  Al3+ + 4OH- == AlO2- + 2H2O

D、氢氧化钡溶液与稀硫酸反应: Ba2+ + SO42- + H+ + OH- == BaSO4↓+ H2O

答案

A

相关题目

 In Canada, cross country skiing is a popular sport among people ______ they c
 In Canada, cross country skiing is a popular sport among people ______ they can enjoy excitement and adventure. A. that                B. where              C. whom 
下列做法不利于避免或减轻洪水造成损失的是(    ) A.
下列做法不利于避免或减轻洪水造成损失的是(    ) A.长江中上游地区植树造林  B.长江中下游地区围湖造田 C.黄河下游加固江防大堤  D.三江
质量为M的物块以速度v运动,与质量为m的静止物块发生正碰
质量为M的物块以速度v运动,与质量为m的静止物块发生正碰,碰撞后两者的动量正好相等,则两者质量之比为M/m可能为                      
If you can look through the text before class,you will find it easy to _____
If you can look through the text before class,you will find it easy to __________ what the teacher teaches. A.take up                         B.take on C.take in   
Each of the students, working hard at his or her lessons,___to go to university.
Each of the students, working hard at his or her lessons,___to go to university.”  “So do I.”A. hope   B. hopes  C. hoping   D. hoped
空气中含量较多且化学性质不活泼的气体是           
空气中含量较多且化学性质不活泼的气体是                              (  ) A. 氧气       B. 二氧化碳         C. 氮气    
I remember my first day here very clearly. My friend was waiting for me when my
I remember my first day here very clearly. My friend was waiting for me when my plane   21     at Kennedy Airport at 3 o’clock in the afternoon. The weather was very   22   and it was s
________, she passed the driving test. A. In short          B. For shor
________, she passed the driving test. A. In short          B. For short         C. In vain       D. In use

最新题目