Ming has two unknown substances. One is nonpolar, and the other is polar. Which process would most likely help Ming identify the unknowns?

Answer 1

Try to dissolve them in water.

Since water is a polar molecule and polar substances dissolve in polar solvents, a polar substance will dissolve in water while a nonpolar substance will not.

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Answer 2

Owen Ambrose

Ming can use the process of chromatography to identify the unknown substances. Chromatography separates substances based on their affinity for a mobile phase (solvent) and a stationary phase. Polar substances will interact more strongly with the stationary phase, causing them to move more slowly through the chromatography medium compared to nonpolar substances. By comparing the retention times of the unknown substances with known standards, Ming can determine whether they are polar or nonpolar.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.