Three brands of sugar-free purple drinks (Brand A, Brand B, and Brand C) are tested. The color is identical, but one of the brands has a different aftertaste.
An analyst compares the food coloring dyes used in the three different drinks using paper chromatography. The resulting chromatogram is shown below:
Calculate the RfR_{\text{f}}Rf value of the blue spot. Give your answer to 2 significant figures.
Which of the brands of drinks would you expect to taste the same? Explain your answer using the chromatogram data.
The colorings are complex mixtures where the components are combined in exact amounts to serve a specific, designed purpose. What name is given to this type of mixture?
Solder (a mixture of tin and lead) is also a mixture where elements are combined in exact amounts. What type of substance is solder? Select one option:
- Allotrope
- Alloy
- Fullerene
- Isotope
- Polymer
A student tests a different dye mixture. In their chromatogram, both the blue and yellow spots remain very close to the baseline and fail to separate. What should the student change in their experiment to successfully separate the blue and yellow spots?