Answer to Question #146495 in General Chemistry for Gusty

Question

1. State the effect of each of the following factors on the calculated molarity of
NaOH and the reported value of the unknown strong acid.
a. A drop of NaOH adheres to the side of the conical flask during the
standardization of NaOH solution.
b. Adding 10 drops of phenolphthalein indicator rather than 2 drops in the
standardization of NaOH.
c. An air bubble is originally trapped in the buret tip but disappears during titration.
d. Addition of distilled water to the conical flask during titration.

Answer 1

When a drop of Sodium Hydroxide adheres to the side then less NAOH will react the acid.

Adding more phenophthalein means more acid will be used so that yhe colour can turn.

When the air bubble disappears then the Sodium hydroxide increases.

Addition of distilled water in the conical flask during titration will alter the reaction.