Question #fe979

1 Answer
Mar 3, 2017

When you choose an indicator you must know the pH of the equivalent point, in your question of water (that with KBr doesn't change pH value from 7) that you obtain making react KOH with KBr. All the indicators that change theirs colour between pH 4-5 and 9-10 are usefull for the titration. for example methyl red or phenolphthalein. In other cases the indicators must be choise with better attention