1.hydrogencarbonate是否carbonic acid？
2.calcium chloride是甚麼顏色和state？
謝謝
(緊急的~)
更新1:
關於第一題的補充： 由於hydrogencarbonate好像含有water和carbon dioxide 但water+carbon dioxide是carbonic acid 所以才出此問題。
hydrogencarbonate是否carbonic acid？還有，calcium chloride是甚麼顏色？急~
2006-12-24 9:27 pm
請回答以下兩條問題。
1.hydrogencarbonate是否carbonic acid？
2.calcium chloride是甚麼顏色和state？
謝謝
(緊急的~)
1.hydrogencarbonate是否carbonic acid？
2.calcium chloride是甚麼顏色和state？
謝謝
(緊急的~)
回答 (2)
2006-12-24 9:38 pm
✔ 最佳答案
carbonic acid是H2CO3，和hydrogencarbonate(HCO3^-)不同calcium chloride是白色和solid state in standard condition(25度，1個大氣壓力).
參考: Handout
2006-12-26 7:49 pm
1.hydrogencarbonate ge chemical formula 係 HCO3^- but carbonic acid ge chemical formula 係 H2CO3.Thus,they are not the same.
2.Calcium ions (Ca^2+)係 colourless ge.而chloride ions( Cl^-)都係colourless ge.The state of calcium chloride is solid.
If you want to prove that it is calcium chloride,you can use flame test to test for calcium and silver nitrate test to test for chloride.If flame test show the brick -red colour,the compound must contains calcium ions (Ca^2+). In silver nitrate test ,a white ppt shows the compound contains chloride ions( Cl^-).
2.Calcium ions (Ca^2+)係 colourless ge.而chloride ions( Cl^-)都係colourless ge.The state of calcium chloride is solid.
If you want to prove that it is calcium chloride,you can use flame test to test for calcium and silver nitrate test to test for chloride.If flame test show the brick -red colour,the compound must contains calcium ions (Ca^2+). In silver nitrate test ,a white ppt shows the compound contains chloride ions( Cl^-).
參考: my knowledge!!
收錄日期: 2021-04-23 16:31:05
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061224000051KK01691