Simply put, titration is a method used to the determine the concentration, (molarity) of a solution.
A typical titration would start with a known quantity of an acid or base solution in a beaker, but the concentration of the solution would be unknown. Next, a buret would be filled with an acid or base solution of a known concentration. If the beaker’s solution was basic, the buret’s would be acidic, and vice versa. Finally, an indicator is added to beaker solution. The indicator will change color when the equivalence point is reached. Then the titration begins.
Solution is released from the buret until the beaker solution changes color, typically a dull pink. Then the amount of solution used in the buret is recorded. Using the equation VANA = VBNB , where V is volume, N is molarity, and A and B are acids and bases respectively. The molarity of the beaker solution can be calculated.
This is possible because acids and bases cancel each other out, and there is a point where they cancel out perfectly, the equivalence point. To figure out the concentration of citric acid in fruit juice, you would perform this process, making sure a basic solution is used in the buret.