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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
What else can I help you with?
Why is the chromatograph line dawn in pencil and not ink?
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.
Why must the level ofthe solvent not reach the pencil line where the spots are?
If the solvent level reaches the pencil line where the spots are, it can dissolve the compounds in the mixture, causing them to spread out and overlap. This can lead to inaccurate results and difficulties in analyzing the separated components on the chromatogram. It's important to maintain the separation of the compounds on the chromatography plate for clear identification.
What is the material in a pencil?
The material in a pencil is typically graphite, a form of carbon that leaves a mark when drawn on paper. The graphite is mixed with clay to create the pencil "lead" that is encased in the wooden barrel of the pencil. The hardness of the lead can vary, producing different shades and line thicknesses.
What are the elements found in pencil lead?
The main element found in pencil lead is graphite. This form of carbon is mixed with clay to create the core of a pencil. Other elements, such as small amounts of wax or additives, may also be used in the production of pencil lead.
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 is the chromatograph line dawn in pencil and not ink?
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.
Why must the level ofthe solvent not reach the pencil line where the spots are?
If the solvent level reaches the pencil line where the spots are, it can dissolve the compounds in the mixture, causing them to spread out and overlap. This can lead to inaccurate results and difficulties in analyzing the separated components on the chromatogram. It's important to maintain the separation of the compounds on the chromatography plate for clear identification.
When setting up a chromatogram suggest why the base line where dyes are placed is not drawn with a pen?
The baseline where dyes are placed in a chromatogram is typically not drawn with a pen because the ink from the pen could potentially interfere with the separation of the dyes. Using a pen may introduce additional components into the chromatogram that can affect the accuracy and reliability of the analysis. Instead, a pencil or other non-reactive marking tool is typically used to mark the baseline.
Is a pencil a line?
No it is not.
Why is it important that you marked the origin line and component locations on the paper with a pencil and not a pen or marker?
because the pen or marker will run and the pencil will not.Did this answer your question(if this did not you are a complete idiot):)
What is a pencil line?
A pencil line is a mark made by a pencil when it is pressed against a surface, leaving behind a trail of graphite. It is usually used for drawing or writing.
Why is it important to use a sharp pencil in biological drawing?
So the drawing is a very fine line and easy to rub out?
What kind of pencil used to draw a border line?
Civil ingineer pencil
Example of an straight line in real life?
The piece of lead in a pencil or the pencil.
How to make a line?
draw it with a pencil
What was produced on the assembly line that cost less than half the amount of other cars?
A pencil, possibly! A pencil, possibly! A pencil, possibly! A pencil, possibly!
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.
