Chemistry F325- End Point/ Equivalence Point

I have been reading about titration curves and I know that the equivalence point is the point in a titration where the volume of one solution has reacted exactly with the volume of the second solution. One volume (say acid) being in the conical flask, and the second volume (alkali) being in the burette. I also know that the equivalence point is the centre point of the vertical section of the titration curve.

The end point is where there are equal concentration of the acid and conjugate forms of the indicator, and thus there will be a colour change, the colour change being halfway of the colours of the acid and conjugate base colours.

But where is the end point labelled on the titration curve? I know where to label the equivalence point, but what about the end point labelling?

MANY MANY THANKS!

Reply 1

Eli996

The end point varies according to the type of titration you do.
STRONG ACID/STRONG BASE= ph 7
STRONG ACID/WEAK BASE= below the equivalence point (basically the end point is towards the lower pH region)
WEAK ACID/STRONG BASE= above the equivalence point.(vice versa)
Btw, can I ask what board you are doing?

(edited 9 years ago)

Reply 2

Chloe.B

Original post by Eli996

The end point varies according to the type of titration you do.
STRONG ACID/STRONG BASE= ph 7
STRONG ACID/WEAK BASE= below the equivalence point t(basically the end point is towards the lower pH region)
WEAK ACID/STRONG BASE= above the equivalence point.(vice versa)
Btw, can I ask what board you are doing?

Thank you for your response, I'm doing OCR Chem A spec! Good luck with your studies.