Chemistry

Chromatography: Separating Mixtures

Introduction:

Magic bulls eye inks are often mixtures of some(prenominal) compounds. Paper chromatography is a common method of separating various components of a mixture. After separation, you can observe the different colors that absorb up a particular color of magic scar ink.

You can also calculate a ratio Rf, which compares how farthest each compound traveled to how far each answer (substance that dissolves another substance) traveled during the experiment.

Rf = Ds/Df
Ds = place traveled by the compound
Df = Distance traveled by the solvent


Materials:

drinking chocolate filter, tape, rubbing alcohol, piddle, 3 different color magic markers (not permanent); 3 identical tall, narrow drinking glasses; metric ruler, 3 pencils

Pre-lab Questions:

1. List one extensive and one intensive post of marker ink.
Intensive-color
Extensive-volume




2. Define mixture.
Mixture contains two or more(prenominal) different substances which are only physically bonded. 



3. Is tap water a heterogeneous or undiversified mixture? pardon your answer.
Heterogeneous, It contains ions, dissolved gases, bacteria, etc.



But unless you are seeing brown chunkies or sediment floating around in it the water is put away a homogeneous mixture since its components are again immix at a microscopic level.








4. Is rubbing alcohol a heterogeneous or homogenous mixture? Explain your answer.
It is homogenous because you cant see the different parts in it





Procedure:

1. condense 3 strips of coffee filter. Be sure that the strips are lots narrower and slightly taller than the drinking glasses.
2. In the center the strips, nearly 3 cm from one end, place a dot of the marker to be tested. The dots should be about 0.2 cm in diam and dark enough to be clearly visible.
3. Place about 2 cm of water in each glass.
4. taping the unmarked end of each strip to the center of a pencil so that the strip hangs down when the pencil is held...If you involve to get a full essay, order it on our website: Orderessay



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