Question

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A different indicator was added to each of the three titrations in the Ka of a weak acid experiment. Why?

	That was how we knew when the titration was completed.
	To demonstrate the difference between an endpoint and an equivalence point.
	To indicate the equivalence point in the titration.

Answer 1

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A different indicator was added to each of the three titrations in the ka of a weak acid experiment to demonstrate the difference between the end point and an equivalence point.

End point comes after the equivalence point. It signifies that the titration is complete and is indicated by the color change. Equivalence point comes before the end point and it is a point where the number of moles of titrant becomes equal to the number of moles of analyte.

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