Explain the choice of an appropriate indicator for a titration, given the equivalence point of the titration and pKa values for possible indicators.

Introduction |  Indicator choice |  Key points |  Learning Check | 

Learning Check

Use the Indicator Explorer applet to choose the best indicator for each of the titrations in the table underneath the applet.


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Titration
Display
Ethylamine added to HCl

 Bromophenol blue
 Bromocresol green
 Methyl red
 Bromothymol blue
 Phenol red

 

NaOH added to methanoic acid

 Bromothymol blue
 Phenol red
 Thymol blue
 Phenophthalein
 Alizarin yellow R

 

Dimethylamine added to chloroethanoic acid

 Bromothymol blue
 Phenol red
 Thymol blue
 Phenophthalein
 Alizarin yellow R