magnesium is put into hydrocloric acid in a test-tube with a stopper
Hydrogen comes cut la
咁個stopper 彈左出黎
點講= =?
chem hydrochloric acid
2007-12-10 4:18 am
回答 (2)
2007-12-10 4:28 am
✔ 最佳答案
因為hydrogen的揮發力好大...所以reaction好...
所以迫到stopper彈出來...
但要記住,只係dilute的HCl先會出現咁的現在...
否則concentration的HCl會出現white fume,十分dangerous
Mg+ HCl----> MgCl+ H2
H2就係令stopper彈出黎...
參考: chemistry informations
2007-12-11 11:36 am
Hydrogen is evolved and accumulates inside the test tube. The stopper will pop up.
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