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The chromatograph line is drawn in pencil because pencil marks are more permanent and less likely to smudge when in contact with the organic solvents used in chromatography. Ink can dissolve or spread when exposed to these solvents, affecting the accuracy of the chromatogram.

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1y ago

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What would happen if you submerge the chromatography paper above the pencil line?

Submerging the chromatography paper above the pencil line would cause the solvent to rise above the line, potentially leading to the ink or pigment above the line to dissolve and be carried upwards with the solvent. This can result in the separation of different components within the ink or pigment.


Why does the baseline need to be drawn in pencil?

A datum line mustn't be drawn in ink so that when you add the solvent while doing chromotography, the ink doesn't spread and it might even mix with the actual color that you are testing on and that could change the r f value whereas if you draw it with a pencil, the results would be more accurate. Hope that helps :)!


Why is it important to use only a pencil to mark the starting line of the chromatogram?

This is so you can know the base line. The base line is used as the starting point for the mesaurements used for the Rf values. you need to know the distance from the base line to the point of the spot to know the Rf values. see related link below for more info about paper chromatography


How do you get Ink out of my sharpie liquid pencil?

To remove ink from a Sharpie liquid pencil, you can try using rubbing alcohol or nail polish remover on a cotton ball or cloth. Gently dab the affected area with the solution until the ink starts to lift. You may need to repeat this process several times and wash the area with soap and water afterward.


Why was a ball pen not used to draw the line?

In chemistry, a pen is not used to draw lines on chromatography paper. A pencil is used to draw lines on the paper because the ink can smear and interfere with the chromatography and the ink will dissolve in the chromatography solvent.

Related Questions

What results will it be if using a pen to draw the start line of paper chromatography?

Using a pen to draw the start line for paper chromatography can result in smudging or mixing of ink with the solute being separated. This can interfere with the accuracy of the separation process as the ink from the pen may also move up the chromatogram along with the components being analyzed. It is recommended to use a pencil or non-waterproof ink to draw the start line for better results.


Is line art the same as pencil art?

not neccessarily, because you can create line art with different medias such as ink. Line art, i think is the usage of lines to create a hidden image. Pencil art is, of course, usage of the glorious pencil.


What would happen if you made the line and points with an ink pen rather than a pencil?

Nothing !... It's just that pencil is easier to erase if you make a mistake.


What is the difference between ink erasers and pencil erasers?

one erases pencil marks and the other erases pen ink


Which was invented first ink pen or pencil?

The ink pen was invented before the pencil. The first ink pen dates back to ancient times, while the modern pencil as we know it today was developed in the 16th century.


What is pencil to ink?

"Pencil to ink" refers to the process of creating a finalized drawing or design by transitioning from a pencil sketch to using ink for the final lines. This is a common technique used in art and illustration to add more definition and detail to the initial pencil drawing.


What would happen if you submerge the chromatography paper above the pencil line?

Submerging the chromatography paper above the pencil line would cause the solvent to rise above the line, potentially leading to the ink or pigment above the line to dissolve and be carried upwards with the solvent. This can result in the separation of different components within the ink or pigment.


Why does the baseline need to be drawn in pencil?

A datum line mustn't be drawn in ink so that when you add the solvent while doing chromotography, the ink doesn't spread and it might even mix with the actual color that you are testing on and that could change the r f value whereas if you draw it with a pencil, the results would be more accurate. Hope that helps :)!


What was a pencil before the pencil was invented?

Ink mixed with ashes and oil. Charcoal was also used.


How do you do a drawing in pen and ink?

I have never used a pen and ink. I use a paint brush and a pencil.


Why should Gary write the labels on paper in pencil why should he not write in ink?

With pencil you can erase, not with pen.


Why is using a pen differ from writing with a pencil?

A pen uses ink while a pencil uses lead.