AP Chemistry
4.6 Introduction to Titration
4.5 Stoichiometry
A student standardizes an
\(\text{HCl(aq)}\) solution of unknown concentration by titrating a \(25.00 \text{ mL}\) sample with a standardized \(0.100 \text{ M}\) \(\text{NaOH(aq)}\) solution according to the equation below.
\[ \text{HCl}(aq) + \text{NaOH}(aq) \rightarrow \text{NaCl}(aq) + \text{H}_2\text{O}(l) \]
Before filling the buret with the \(\text{NaOH(aq)}\) solution, the student rinses the buret with deionized water but fails to rinse it with the \(0.100 \text{ M}\) \(\text{NaOH(aq)}\) titrant solution, leaving residual water inside the buret barrel. Which of the following best explains how this error affects the calculated molarity of \(\text{HCl(aq)}\)?
\(\text{HCl(aq)}\) solution of unknown concentration by titrating a \(25.00 \text{ mL}\) sample with a standardized \(0.100 \text{ M}\) \(\text{NaOH(aq)}\) solution according to the equation below.
\[ \text{HCl}(aq) + \text{NaOH}(aq) \rightarrow \text{NaCl}(aq) + \text{H}_2\text{O}(l) \]
Before filling the buret with the \(\text{NaOH(aq)}\) solution, the student rinses the buret with deionized water but fails to rinse it with the \(0.100 \text{ M}\) \(\text{NaOH(aq)}\) titrant solution, leaving residual water inside the buret barrel. Which of the following best explains how this error affects the calculated molarity of \(\text{HCl(aq)}\)?
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