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Which of these indicators would be appropriate for the following titrations. Methyl Orange pKa = 4.1    Bromthymol...

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Chemistry

Which of these indicators would be appropriate for the followingtitrations.

Methyl Orange pKa = 4.1   
Bromthymol Blue pKa = 7.0
Phenolphthalein pKa = 9.3

ethylamine titrated with hydrochloric acid

perchloric acid titrated with lithium hydroxide

formic acid titrated with sodium hydroxide

sodium acetate titrated with nitric acid

Answer & Explanation Solved by verified expert
4.2 Ratings (743 Votes)
The best indicator is the one whose pKa matches with the pH of the titration at equivalence point A Titration of ethylamine with HCl The conjugate acid of a weak base is a strong acid So the pH    See Answer
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