點樣可以自製氫氣??

Use Water + large amount of salt (NaCl)

>>> a concentrated NaCl (aq) as the electrolyte

Use the carbon in the pencil as the two electrodes

Use two 1.5V battery as the power source

You may get hydrogen and chloride gas


(My F.5 Chemistry teacher told me a girl use this method to produce hydrogen and chloride gas at home. She did it successfully. But she was later admitted to hospital and the then newspaper reported it)

Very dangerous. Don't try it

醋同鐵釘都係d廢野= =
醋係弱酸好難有野出
你去d5金鋪睇下有冇HCl
同埋鐵釘換鋁片
2Al+6HCl→2AlClз+3H2

用個test tube裝住一棵小植物，要蓋上蓋，再擺系太陽下面曬，棵植物就會進行光合作用，跟住就可以收集氧氣啦～