Chapter 4, Problem 70QAP

Three students titrate different samples of the same solution of HCI to obtain its molarity. Below are their data.

Student A: $\text{2}0.00\text{ mL HCl}+\text{2}0.00\text{ mL}{\text{H}}_{\text{2}}\text{O}$ 0.100 M NaOH used to titrate to the equivalence point

Student B: $\text{2}0.00\text{ mL HCl}+\text{4}0.00{\text{ mL H}}_{\text{2}}\text{O}$ 0.100 M NaOH used to titrate to the equivalence point

Student C: $\text{2}0.00\text{ mL HCl}+\text{2}0.00{\text{ mL H}}_{\text{2}}\text{O}$ 0.100 M Ba(OH)₂ used to titrate to the equivalence point.

All the students calculated the molarities correctly. Which (if any) of the following statements are true?

(a) The molarity calculated by A is half that calculated by B.

(b) The molarity calculated by A is equal to that calculated by C.

(c) The molarity calculated by B is twice that calculated by C.

(d) The molarity calculated by A is twice that calculated by B.

(e) The molarity calculated by A is equal to that calculated by B.