Question

what is the main purpose of acid - base titration?
to study the solubility of a base in an acidic solution
to determine the unknown concentration of an acid or base
to determine the chemical group present in an acid or base
to identify the color of a solution
question 2
a titration curve is a graph of
concentration vs. volume of base (or acid) added
ph vs. volume of base (or acid) added
ph vs. time
concentration vs. time

Explanation:

Acid - base titration is a common laboratory method of quantitative chemical analysis used to determine the concentration of an unknown acid or base. A titration curve is a graph that shows the change in pH of a solution during a titration as the volume of the titrant (base or acid) is added.

Answer:

1. To determine the unknown concentration of an acid or base
2. pH vs. volume of base (or acid) added