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- May 21, 2010
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Hi everyone,
I will be taking the MCAT soon and I have been doing content review on areas that I am week. I hate acids and bases and have been reviewing thoroughly using the TPR science book, TBR, and EK chemistry!....I have found TBR very helpful for all sciences but honestly, they go way into calculations on everything. I thought the simple acid base calculations were:
[H+]=10^-pH and conversely the pH=log (H+)
However, sometimes when there are weird numbers like say [H+]= 3.0 x 10^-2, the TBR says to know the Log 3= 0.48 so that you can arrive at the pH by doing :
pH= 2-log 3, which according to them you need to memorize these logs to find out that the pH is around 1.52. Honestly, is this necessary? on the MCAT aren't the answers pretty spread out for acids and bases? wouldn't knowing that 10^-2 is a pH of around 2 suffice, or should we know its less bc the log of 3 is 0.48? Thanks for the help guys!!!
I will be taking the MCAT soon and I have been doing content review on areas that I am week. I hate acids and bases and have been reviewing thoroughly using the TPR science book, TBR, and EK chemistry!....I have found TBR very helpful for all sciences but honestly, they go way into calculations on everything. I thought the simple acid base calculations were:
[H+]=10^-pH and conversely the pH=log (H+)
However, sometimes when there are weird numbers like say [H+]= 3.0 x 10^-2, the TBR says to know the Log 3= 0.48 so that you can arrive at the pH by doing :
pH= 2-log 3, which according to them you need to memorize these logs to find out that the pH is around 1.52. Honestly, is this necessary? on the MCAT aren't the answers pretty spread out for acids and bases? wouldn't knowing that 10^-2 is a pH of around 2 suffice, or should we know its less bc the log of 3 is 0.48? Thanks for the help guys!!!
