Final answer:
An indicator like methyl orange is used to determine if too much acid is added to a solution, with a color change indicating a significant pH shift. In everyday life, antacids neutralize excess stomach acid by reacting with HCl. In titrations, the equivalence point is identified by an indicator's color change.
Step-by-step explanation:
To determine if you've added too much acid to a solution, you may use an indicator like methyl orange. In a buffered solution with a pH 8, the addition of a small amount of acid will not significantly affect the pH, as indicated by no dramatic change in the color of the indicator.
In practical situations such as experiencing discomfort after eating too much pizza due to excess stomach acid, an antacid can be taken. The base in the antacid will react with the HCl in the stomach and neutralize it. Likewise, in titrations, the equivalence point can be determined by observing the color change of an indicator added to the reaction, which occurs when the acid and base have completely neutralized each other.