(1)在饱和氯化铁溶液中加入碳酸钙粉末,发现碳酸钙逐渐溶解,

(1)在饱和氯化铁溶液中加入碳酸钙粉末,发现碳酸钙逐渐溶解,同时还产生的现象有①__________________,②________________。用离子方程式表示产生上述现象的原因___________________________________________________________________。

(2)在饱和氯化铁溶液中加入一种单质,也会产生类似上述现象的反应,这种单质是_______。

A.磷                      B.硫                      C.镁                   D.铜

答案

解析:(1)Fe3++3H2O

Fe(OH)3+3H+,2H++CaCO3====Ca2++H2O+CO2↑,所以,平衡向右移动,溶液颜色加深,产生红褐色胶体,同时产生CO2

(2)Mg能与H+反应。

答案:(1)①有无色气体生成  ②溶液颜色变深,产生红褐色胶体(久置有红褐色沉淀)  Fe3++3H2O

Fe(OH)3+3H+,CaCO3+2H+====Ca2++CO2↑+H2O(2)C

相关题目

“黄梅时节家家雨,青草池塘处处蛙”描述的地区是(   
“黄梅时节家家雨,青草池塘处处蛙”描述的地区是(    ) A、长江中上游地区         B、南部沿海地区 C、珠江三角洲             D、长
So difficult     it to learn a large vocabulary without the help of a teac
So difficult     it to learn a large vocabulary without the help of a teacher that he was close to giving up.    A. was he feeling   B. is he feeling    C. does he feel   D. did he fe
计算:【    】 A.-1               B.1          
计算:【    】 A.-1               B.1                 C.4              D.-4
 —We missed a chance to win a goal. —______. A. Congratulations    B. W
 —We missed a chance to win a goal. —______. A. Congratulations    B. Well done             C. What a pity        D. Good luck
阅读下文,完成第1—5题。 城市景观花卉装饰 ①随着社会的
阅读下文,完成第1—5题。 城市景观花卉装饰 ①随着社会的发展和人类文明程度的日益提高,城市景观花卉装饰已逐渐成为评价一座城市的文明程度和
— What do you mean _______ saying “The body is over growing.” ?     
— What do you mean _______ saying “The body is over growing.” ?        — I mean that he is tall ______ his age. A. by; for          B. as to ; for        C. about ; w
--Let’s play computer games. --Great! That sounds_______.A.boringB.difficu
--Let’s play computer games. --Great! That sounds_______.A.boringB.difficultC.interestingD.sad
Music is the international language. The songs sung or     61._____playi
Music is the international language. The songs sung or     61._____playing by instruments are beautiful to people everywhere.      62._____Popular music in America is that every stude

最新题目