Answer to Question #142247 in General Chemistry for Aida

Question

If the endpoint is surpassed in a back titration with NaOH, will the reported amount of antacid in the
sample be too high or too low? Explain.

Answer 1

The reported amount of antacid will be too low because if you added excess, there would be more subtracted from the acid used. The excess NaOH subtracted from the acid will get lower than the actual amount of reported antacid, because you will calculate higher concentration of excess reagent than what is supposed to be.