Which of the following descriptions are correct about the “equivalence point” an

Question

Which of the following descriptions are correct about the “equivalence point” and the “end point”?

correct incorrect  The equivalence point is the same as the end point.
correct incorrect  End point cannot be used to determine the equivalence point in a precipitation titration.
correct incorrect  At the end point, a physical property of the solution suffers a sudden change.
correct incorrect  At the end point, the quantity of added titrant is the exact amount necessary for stoichiometric reaction with the analyte.

Explanation / Answer

1.Incorrect

An endpoint is indicated by some form of indicator at the end of a titration.

Anequivalence point is when the moles of a standard solution (titrant) equal the moles of a solution of unknown concentration (analyte).

2. Incorrect

End point cannot be used to determine the equivalence point in a precipitation titration.

3. Correct

At the end point, a physical property of the solution suffers a sudden change.

4. Correct

At the end point, the quantity of added titrant is the exact amount necessary for stoichiometric reaction with the analyte.

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