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    Why is the current draw dropping in water electrolysis

    We've done an experiment regarding water electrolysis. Basically, we just separated the oxygen and hydrogen gas in a beaker that contains a magnesium sulfate solution. We set the power supply voltage to 12.46V with an initial .09A and final .01A over 45 mins. I was wondering as to what causes...
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    Please help me draw this molecule from the IUPAC name

    I'm supposed to draw a molecule using it's IUPAC name, which is 5-methyhept-3-ynoic acid. Right now i have CH3 CH2 CH? CH2 CHCH3 CH2 CH3 don't know what to do about the ynoic acid part on the third carbon. what do I put there? please help, this is due tomorrow and i'm really lost!
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    Analytical chemistry - bromine water

    Hi! I live in Norway so we don't have the high school system. I'm 18 and am soon finishing my second year in "college". Anyway, we got a question in class that we have to solve, and can somebody please help me solve it? In some experiments an equal amount of bromine water was added to two test...