AP Chemistry
8.5 Acid-Base Titrations
A student determines the concentration of a monoprotic acid, \(\text{HA(aq)}\), by titrating a \(25.00\text{ mL}\) sample with \(0.1000\text{ M}\) \(\text{NaOH(aq)}\). The endpoint is assumed to coincide with the equivalence point.
Before each trial, the student rinses the buret with deionized water, drains it, and then fills it directly with the \(\text{NaOH(aq)}\) titrant. A small, reproducible volume of water remains in the buret and mixes with the titrant. The student calculates the acid concentration using the labeled \(0.1000\text{ M}\) titrant concentration and the recorded buret volume.
How does rinsing the buret only with deionized water affect the calculated concentration of \(\text{HA}\)?
Before each trial, the student rinses the buret with deionized water, drains it, and then fills it directly with the \(\text{NaOH(aq)}\) titrant. A small, reproducible volume of water remains in the buret and mixes with the titrant. The student calculates the acid concentration using the labeled \(0.1000\text{ M}\) titrant concentration and the recorded buret volume.
How does rinsing the buret only with deionized water affect the calculated concentration of \(\text{HA}\)?
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