In addition to redox indicators and starch-iodine complex,the equivalence point for a redox titration can be determined using a Gran plot.Which is NOT true for Gran plots? A)Gran plots give best results using redox data well before the equivalence point. B)Gran plots are constructed by plotting the volume titrant added on the x-axis and V-10⁻^nE/0.05916 on the y-axis. C)The plot of V versus V-10⁻^nE/0.05916 is a straight line with the x-intercept = equivalence point volume. D)Constant ionic strength over the course of the titration minimizes error in the equivalence point. E)Gran plots are more error prone than first derivative and second derivative plots.

Question

Quizplus · Accepted Answer

Gran plots are generally considered less error prone than other methods such as endpoint detection using color change or pH, but they may still be affected by experimental errors such as variation in electrode potential, deviation from the theoretical Nernstian slope, and temperature changes. Additionally, first derivative and second derivative plots may offer better resolution of the equivalence point and help to reduce error. Therefore, choice E is not true.

In Addition to Redox Indicators and Starch-Iodine Complex,the Equivalence Point