Quote:
Originally Posted by JonSnow
Thanks for the replies. Quick question:
The pH of a 100 mL solution containing 1 mL of 10 mM SHS, 1 mL of 10 mM MOPS and 20 mL of 500mM HCL is (MOPS:pK=7.2; SHS:pK=5.5)...
where do I even begin?
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Just pay attention to what you have and how much of it relative to the others. HCl dominates (20x the volume as the others, 500x the concentration. Also, HCl is a strong acid, while the other two will barely produce any H+ at all). pH is easy with just HCl.
I actually did it will all three to make sure (in practice, not on the test lol), and they only add like a 0.001 difference (Or something like that, I forget).