Question

The end point of a titration is defined as the volume of titrant added, while the equivalence point is the volume required for complete reaction with the analyte. By choosing the proper _____________, scientists can minimize the difference in these two numbers, allowing more accurate measurements in the lab.

a. titrant


b. indicator


c. solvent


d. analyte

Answer 1

Answer: INDICATOR

Step-by-step explanation:

A particular indicator is chosen because it is designed to change color very close to the equivalence point of a reaction, thus making the end point of a titration very close to the equivalence point.

Step-by-step explanation:

Answer 2

...BY CHOOSING A PROPER INDICATOR, SCIENTISTS CAN MINIMIZE THE DIFFERENCE IN THESE TWO NUMBERS,...

Step-by-step explanation:

A chemical indicator is an agent or substance which gives a visible sign especially a color change when introduced to a solution of base indicating the threshold of the concentration of acid used in the titration procedure. These indicators include methyl orange, methyl red, phenolpthalein. They give a color change when the concentration of an acid as reached a critical limit in order for the reaction to be stopped. These indicators are involved in acid-base titrations, oxidation- reduction reactions and so on. More accurate results of the volume of the required acid or base is obtained by the introduction of these indicators.