Question

(b) the student used a 50.0 ml buret to add the kmno₄(aq) to the h₂c₂o₄(aq) until a faint lavender color was observed in the flask, an indication that the end point of the titration had been reached. the initial and final volume readings of the solution in the buret are shown below. write down the initial reading and the final reading and use them to determine the volume of kmno₄(aq) that was added during the titration.

Explanation:

Step1: Read the initial volume

The initial reading is \( 3.00\ \text{mL}\) (read from the bottom of the meniscus).

Step2: Read the final volume

The final reading is \( 28.00\ \text{mL}\) (read from the bottom of the meniscus).

Step3: Calculate the volume added

The volume of \(KMnO_4(aq)\) added \(V = V_{\text{final}}-V_{\text{initial}}\)

$$V=28.00\ \text{mL}- 3.00\ \text{mL}$$

Answer:

The initial reading is \(3.00\ \text{mL}\), the final reading is \(28.00\ \text{mL}\), and the volume of \(KMnO_4(aq)\) added is \(25.00\ \text{mL}\)