Two different hydrogen equation in Chemistry (1 Viewer)

[choeric17]

Hello, to people who do chemistry and can explain this well will be my saviour.

In chemistry data sheet, there is two half equations for HYDROGEN. I am confused what equation I have to use for reduction and what equation to use in oxidation..

Appreciate much help, thanks

 

[leehuan]

You are posting this in the wrong section of the forum.


Look at what substances are present in YOUR question, then choose which to use. Asking this question arbitrarily doesn't do any good because for different questions, the answer is different.