Conductivity curves for titration (1 Viewer)

[NexusRich]

Yo guys,
In the textbook, it says that conductivity graphs are preferred over normal titration curves for the following reasons:
- works well in diluted solutions
- when species are at trace level
- when using coloured or turbid solution
- when system involves incomplete reactions
- for acid-base, prepcipitation and non aqueous solutions.
But the textbook hasnt explained what these criteria really means, could someone please explain it.
Thanks !!!!!!

 

[Qeru]

Yo guys,
In the textbook, it says that conductivity graphs are preferred over normal titration curves for the following reasons:
- works well in diluted solutions
- when species are at trace level
- when using coloured or turbid solution
- when system involves incomplete reactions
- for acid-base, prepcipitation and non aqueous solutions.
But the textbook hasnt explained what these criteria really means, could someone please explain it.
Thanks !!!!!!

Most of these are self-explanatory if you know the limitations of titrations. The first thing you have to note is that normal titration is usually done by eye when the solution changes colour because of an indicator, whereas conductometric titration is done with a conductometer. So all these reasons involve a colour change vs a conductivity reading on a machine.
-For the first dotpoint it's usually very difficult to observe notable colour changes when the substances are dilute whereas a machine can pick up dilute amounts of solution
-Same ideas as first
-In coloured solutions seeing the colour change from the indicator is difficult (or even impossible) as the colour of the solution may overpower that of the indicator, whereas conductometry does not rely on colour change at all
-Same idea incomplete reactions means the indicator won't work as effectively whereas the machine can record any miniscule changes to the reaction (even if it's incomplete).
-This one is debatable but again for normal titration you need to be accurate in determining the colour change whereas the machine does all the work for you in a conductometric titration.

 

[NexusRich]

Most of these are self-explanatory if you know the limitations of titrations. The first thing you have to note is that normal titration is usually done by eye when the solution changes colour because of an indicator, whereas conductometric titration is done with a conductometer. So all these reasons involve a colour change vs a conductivity reading on a machine.
-For the first dotpoint it's usually very difficult to observe notable colour changes when the substances are dilute whereas a machine can pick up dilute amounts of solution
-Same ideas as first
-In coloured solutions seeing the colour change from the indicator is difficult (or even impossible) as the colour of the solution may overpower that of the indicator, whereas conductometry does not rely on colour change at all
-Same idea incomplete reactions means the indicator won't work as effectively whereas the machine can record any miniscule changes to the reaction (even if it's incomplete).
-This one is debatable but again for normal titration you need to be accurate in determining the colour change whereas the machine does all the work for you in a conductometric titration.

Thanks bro, this is really helpful