Question

what is the endpoint in relation to a titration?
the point where the color changes for the indicator during the titration.
the chemical for which the volume is known, but the concentration is not.
the point where moles of acid equal moles of base.
the chemical for which both the concentration and volume are known.

Explanation:

In a titration, the endpoint is determined by the color - change of the indicator. The point where moles of acid equal moles of base is the equivalence point. The chemical with known volume but unknown concentration is the analyte. The chemical with known concentration and volume is the titrant.

Answer:

The point where the color changes for the indicator during the titration.