The equivalence point in a titration refers to the point when the mL of the acid equals the mL of the base.
the molarity of the acid used in the reaction equals the molarity of the base used in the reaction.
the number of moles of one reactant reacts completely with the moles of the other reactant.
the acid in the flask turns clear.

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]