Wich of the following is NOT true about the blank for the experiment, 'Analysis of a Complex Iron Salt'?

A. The volume required to titrate the blank is subtracted from the volume used to titrate the analyte solution to give the "corrected volume".
B. A blank is composed of the solvent used to dissolve the analyte. For this experiment, the solvent is a combination of sulfuric acid, phosphoric acid, and water.
C. A blank is titrated to correct for any reactive impurities in the solvent. For this experiment, the impurities would be reducing agents that would react with KMnO4 (mimicking the behavior of C2O42¡V ).
D. The blank for this experiment must have 100 % transmittance if placed in a spectrometer (Spec 20).
E. All of these are true.

E is NOT NOT NOT THE ANSWER!!!!

the answer is D :)

D is correct!!

To determine which statement is NOT true about the blank for the experiment 'Analysis of a Complex Iron Salt', we will examine each option:

A. The volume required to titrate the blank is subtracted from the volume used to titrate the analyte solution to give the "corrected volume": This statement is generally true. When performing a titration, the volume used to titrate the blank is subtracted from the volume used to titrate the analyte solution to determine the corrected volume.

B. A blank is composed of the solvent used to dissolve the analyte. For this experiment, the solvent is a combination of sulfuric acid, phosphoric acid, and water: This statement is true. In this experiment, the blank is created by using the solvent, which is a mixture of sulfuric acid, phosphoric acid, and water, to dissolve the analyte.

C. A blank is titrated to correct for any reactive impurities in the solvent. For this experiment, the impurities would be reducing agents that would react with KMnO4 (mimicking the behavior of C2O42–): This statement is generally true. The blank is titrated to account for any reactive impurities in the solvent, such as reducing agents that could interfere with the analysis of the analyte. In this experiment, these impurities mimic the behavior of the C2O42– ion.

D. The blank for this experiment must have 100% transmittance if placed in a spectrometer (Spec 20): This statement is NOT true. The blank is not required to have 100% transmittance in a spectrometer. Transmittance refers to the amount of light that passes through a sample, and it is used to measure the concentration of the analyte. The blank is used to correct for background signals and interfering substances, but it does not need to have 100% transmittance.

E. All of these are true: Since statement D is not true, this option cannot be correct.

Therefore, the statement that is NOT true about the blank for the experiment 'Analysis of a Complex Iron Salt' is letter D.