A student conducts a titration to determine the molarity of a hydrochloric acid solution. HCl(aq), by reacting it with a standardized stock solution of sodium hydroxide NaOH(aq). The student uses 10 mL of the unknown acid and titrates to the end point of the indicator. The student calculate the percent error of the molarity of the acid to be 35%. which of the following could account for the largest percent error?
