Question:How does the equivalence point of a titration differ from its end point?
Answer:
The equivalence point is the point where the number of moles of base equal the number of moles of acid. The end point is the point where the indicator being used changes color. If the indicator is chosen correctly, the end point will essentially be exactly at the equivalence point. The point of the titration is to find the equivalence point -- the end point is just a very close approximation to it. This is because the pH of the solution changes very rapidly close to the equivalence point. Therefore, the indicator will change colour very close to the equivalence point because of the steepness of the pH change.
I understood now,clearly!
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Great, after reading this, I suddenly remembered... We have to blog about this crap too. What luck, last day of the holidaes. Oh well, thanks for the unoffocial reminder, haha.
ReplyDeleteBye bye
AI
oooh gosh. i also almost forgot about this little topic. But i just posted 2 just now only, lol. never mind, i'll update about it tomorrow.
ReplyDeleteoh, Good summary btw,
got journalist potential. hahaha!
Take cares. =)
i like the colors,they look like indicators,except the green,which is end pt.
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