Friday, June 4, 2010

equivalence point titration

To reach the equivalence point in

To reach the equivalence point in

The equivalence point of the titration is the point at which exactly enough

The equivalence point of the titration is the point at which exactly enough

At the third equivalence point, only the weak base PO43- is in the solution.

At the third equivalence point, only the weak base PO43- is in the solution.

titration curve with sharp jump from pH = 2 to pH = 11 as equivalence point

titration curve with sharp jump from pH = 2 to pH = 11 as equivalence point

Moreover, the equivalence point itself is shifted upward in pH.

Moreover, the equivalence point itself is shifted upward in pH.

The slope of the titration curve is steepest at the equivalence point,

The slope of the titration curve is steepest at the equivalence point,

How to Find an Equivalence Point Titration

How to Find an Equivalence Point Titration

In the weak acid titration, thymol blue changes colour at the equivalence

In the weak acid titration, thymol blue changes colour at the equivalence

Near the equivalence point there is a rapid increase in pH.

Near the equivalence point there is a rapid increase in pH.

At the stoichiometric or equivalence point (S on the curve),

At the stoichiometric or equivalence point (S on the curve),

At the equivalence point the solution contains only

At the equivalence point the solution contains only

 we have reached the equivalence point in such a titration experiment?

we have reached the equivalence point in such a titration experiment?

The real equivalence point would be between 22.5 and 25.0 -- and probably

The real equivalence point would be between 22.5 and 25.0 -- and probably

 point; equivalence point; right of equivalence point. Titration of a

point; equivalence point; right of equivalence point. Titration of a

Chemistry: Calculating pH at various points on a titration curve.

Chemistry: Calculating pH at various points on a titration curve.

To clear confusion, the endpoint and equivalence point are not necessarily

To clear confusion, the endpoint and equivalence point are not necessarily

This is not the only method to determine the equivalence point,

This is not the only method to determine the equivalence point,

It is observed that at the equivalence point pH is 7 but the pH sharply

It is observed that at the equivalence point pH is 7 but the pH sharply

 to the equivalence point than in a strong acid-strong base titration,

to the equivalence point than in a strong acid-strong base titration,

The pH decreases slowly in the beginning and near the equivalence point

The pH decreases slowly in the beginning and near the equivalence point

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