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A few questions on equivalence:
- TBR says we can estimate the equivalence point by averaging the pKa of the acid and the pH of the titrant. But it also says that the equivalence point changes based on concentration of the acid. Is this just not taken into account in this short cut??
- I'm not very clear in general how to estimate the pH at equivalence with a weak acid titrated with a strong base. Should we use the pKa +pH average? Should we use pOH=1/2pKb-1/2log[A-]? How do you guys normally do it?
- Can someone explain table 5.3 on page 306 in the chem 1 book? (it does pH calculations) Why are they using mL instead of moles in the henderson-hasselbach equation?
THANK YOU!! I just wanna throw it how thankful I am for sdn.. "mcat study question Q&A" keeps me excited about studying for the mcat.. its helpful (and fun!) to discuss questions!! 😍
- TBR says we can estimate the equivalence point by averaging the pKa of the acid and the pH of the titrant. But it also says that the equivalence point changes based on concentration of the acid. Is this just not taken into account in this short cut??
- I'm not very clear in general how to estimate the pH at equivalence with a weak acid titrated with a strong base. Should we use the pKa +pH average? Should we use pOH=1/2pKb-1/2log[A-]? How do you guys normally do it?
- Can someone explain table 5.3 on page 306 in the chem 1 book? (it does pH calculations) Why are they using mL instead of moles in the henderson-hasselbach equation?
THANK YOU!! I just wanna throw it how thankful I am for sdn.. "mcat study question Q&A" keeps me excited about studying for the mcat.. its helpful (and fun!) to discuss questions!! 😍