Question

Thin Layer Chromatography (TLC) polarity questions Is silica gel polar or non polar and why? How...

Thin Layer Chromatography (TLC) polarity questions

Is silica gel polar or non polar and why? How do different solvents with different polarities cause different elution patterns on a TLC slide? What causes substances to separate as they move up a TLC slide?

Homework Answers

Answer #1

Silica gel is polar nature. it is a polymer of -(Si-O-Si)- it has electronegative Oxygen atom. if an organic compound has polar groups such as -OH, -NH2 will bind tightly with silica gel. Hence it will be eluted only with strong polar solvents like CH3OH, CHCl3 etc.,

TLC slide works with the principle of mobility or capilliary action of atoms or groups.compounds with no polar groups like alkene, benzene etc., will have greater mobility than compounds has polar groups like -OH, -NH2 for example phenol aniline etc.,so Rf value will be higher for non polar compounds than polar compounds.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT