Question

question 5 of 18 < points possible: 1.00 two compounds might have spots with the same rf value in a chromatography experiment and not be identical compounds. which proposed chromatography experiment could best help determine whether the compounds are identical? select one: repeat the original experiment with a different solvent system repeat the original experiment with a mixture of the compounds in a single spot repeat the original experiment with the development chamber jar open repeat the original experiment with larger spots of each compound

Explanation:

In chromatography, different solvents can affect the separation and movement of compounds. If two compounds have the same Rf value, changing the solvent system can change their interactions with the stationary and mobile phases, potentially resulting in different Rf values and helping to determine if they are identical or not. Opening the development chamber jar would affect the experiment negatively by disrupting the equilibrium of the mobile - phase vapor. Repeating with larger spots or a mixture of compounds in a single spot does not address the issue of differentiating between compounds with the same Rf value.

Answer:

Repeat the original experiment with a different solvent system