[Pirt]

Hi,

I have a question where i need to work out which indicator would be best to use for each acid base reaction, I have the pKa values of each indicator that i can use and I am also told the concentrations of the reagents that are used, I as just wondring how to go about this question because surely the pka and pkb values would be the same if the concentrations are the same for each acid and base.

I would be grateful if someone could show me how to go about answerinng this question.

Thanks

[Borek]

For every titration calculated pH of endpoint and select the indicator that has pKa as close to that endpoint as possible.

If you are asked this question you probably have a chapter in your book describing how the indicator color changes and what should be taken into consideration when using one or two color indicators.

[P-man]

Hey Borek!
What a coincidence! Do you use any other chemical forums? Would you recommend any? Sorry about braking the topic, but I think it's pretty much answered.
Pierre

[Donaldson Tan]

Hey Borek!
What a coincidence! Do you use any other chemical forums? Would you recommend any? Sorry about braking the topic, but I think it's pretty much answered.
Pierre

p-man, this is THE chemical forums. lol.

[Borek]

What a coincidence! Do you use any other chemical forums? Would you recommend any?

That's not a coincidence, that's hard work. I am registered on at least 10 forums and frequent on three. And I am not the only one - I think I have seen jdurg, Mitch, GCT and budullewraagh in more than one place. But you already know the best ones.

[Mitch]

I have to recruit talent somehow.

[P-man]

What's the third you frequent???