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Remember though...if it is an indefinite integral to add +C at the end. So it becomes 1/2e^x^2 + C.

have a look at the structural formula for ethanol. On the right hand side the "hydroxy" group is the OH. Because oxygen is more electronegative than carbon or hydrogen is can dissolve polar substances, hence it being the polar end. Now take a look on the left hand side, this has no oxygen, just...

Yep that's exactly right hipsta_jess I had a question exactly like that in my trials. The two metals were Pb(II) and Zn. So you go to your standard potentials sheet...see...which one is more reactive and bingo you have your anode and cathode. Quite simple really.

No no hipsta_jess, boiling the water is to get rid of any dissolved oxygen present in the water. Dissolved oxygen can affect the rate of corrosion. You place a stopper on the top to prevent any oxygen from dissolving back into the water. BUT there is still oxygen left in the test tube for it to...