粉筆可以用黎做咩實驗

粉筆會同酸性既物質有reaction
例如vinegar
將粉筆擺落vinegar會有bubble gas出黎(Carbon dioxide gas)

2009-11-26 20:47:16 補充：
假如又擺落hydrochloric acid
calcium carbonate (粉筆入面含有的物質) +hydrochloric acid ---> calcium chloride + water + carbon dioxide
擺落sulphuric acid
calcium carbonate + sulphuric acid ---> calcium sulphate + water + carbon dioxide

2009-11-26 20:48:48 補充：
有關影片:http://www.youtube.com/watch?v=1olHaLBnqvY

2009-11-26 20:50:10 補充：
假如又擺落hydrochloric acid
calcium carbonate (粉筆入面含有的物質) +hydrochloric acid ---> calcium chloride + water + carbon dioxide
擺落sulphuric acid
calcium carbonate + sulphuric acid ---> calcium sulphate + water + carbon dioxide

有關影片
http://www.youtube.com/watch?v=1olHaLBnqvY

2009-11-26 20:50:56 補充：
假如又擺落hydrochloric acid
calcium carbonate (粉筆入面含有的物質) +hydrochloric acid ---> calcium chloride + water + carbon dioxide
擺落sulphuric acid
calcium carbonate + sulphuric acid ---> calcium sulphate + water + carbon dioxide

有關影片
http://www.youtube.com/watch?v=1olHaLBnqvY

2009-11-26 20:51:02 補充：
假如又擺落hydrochloric acid
calcium carbonate (粉筆入面含有的物質) +hydrochloric acid ---> calcium chloride + water + carbon dioxide
擺落sulphuric acid
calcium carbonate + sulphuric acid ---> calcium sulphate + water + carbon dioxide

有關影片
http://www.youtube.com/watch?v=1olHaLBnqvY

2009-11-26 20:52:17 補充：
http://www.youtube.com/watch?v=YUHNR4WR9Ew&NR=1&feature=fvwp