A different student titrates three 25.00 mL samples of an aqueous HCl solution with…
CHEMISTRY · Multi-part · A Level · Chemistry · Acids and bases · Acids and bases
Problem
A different student titrates three 25.00 mL samples of an aqueous HCl solution with standardized 0.124 M NaOH. The buret readings are summarized below.
Volume of NaOH added (mL):
Trial 1: 21.44
Trial 2: 21.32
Trial 3: 21.51
(a) Calculate the molarity of the HCl solution for each trial. Show all work with units.
(b) Determine the average molarity of the HCl solution, expressing your answer to the correct number of significant figures.
(c) Identify one plausible source of random error in this procedure and discuss whether it would cause the calculated average molarity to be higher, lower, or unchanged. Support your reasoning.