How does a solvent affect rf value?

The better something dissolves in the solvent, the higher its Rf value will be.

The retention factor ##r_f## of something in chromatography is basically a measure of how well something can be carried in the as it moves. For example, things that spend a lot of time in the mobile phase (dissolved in the solvent) and a little time in the stationary phase (stuck to the silica gel or other medium) will have a higher ##r_f## value than something that spends most of its time stuck to the stationary phase.

As a result, the polarity of the solvent is very important. As I’m sure you’ve already seen, are very good at dissolving in solvents with similar polarities (“like dissolves like.”) As a result, a polar will have a much higher ##r_f## value if the solvent is also polar.

In practice, this requires some tinkering in the lab. You may find that using acetone isn’t good at separating the solutes because both have similar polarities. As a result, you may want to go with a less polar solvent such as hexane, or a combination of polar and nonpolar solvents (ethyl acetate/hexane).

Here is a video which shows a paper chromatography experiment which was conducted to separate the pigments found in a black overhead marker.

Video from: Noel Pauller


Show more

Calculate Your Essay Price
(550 words)

Approximate price: $22

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
The price is based on these factors:
Academic level
Number of pages
Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Read more

Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Read more

Privacy policy

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

Read more

Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Read more

Order your essay today and save 10% with the coupon code: best10