Question

Do polar or nonpolar compounds travel faster on silica gel? Explain 4. Do polar or nonpolar solvents have greater eluting ability? Explain 3.

Answer 1

Question 3

Non polar compounds are travel faster on silica gel. Silica gel is generally used stationary phase and the empirical formula is SiO2. , The polar functional groups interacts strongly with the surface of silica gel particle while nonpolar functional groups are not interacting well. Polar compounds can interact through hydrogen bonds and dipole-dipole interactions.

Question 4

Polar compounds are interacting with polar solvents while non polar solvent interacting with non polar solvents. The mobile phase can be used in organic solvent or mixture of organic solvents. Hence the polar organic compounds only free to move with polar solvents .