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Paper Chromatography Basics

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Questions and Answers

Why is a pencil used to draw the baseline and midline on the chromatography paper?

To add color to the chromatography paper
To make the lines more visible
To create a permanent mark on the paper
To prevent experimental error in chemical separation (correct)

Why is it important to ensure a gap between the ink dot and the solvent?

To make the chromatography process faster
To ensure the solvent reaches the ink dot quickly
To prevent the ink from mixing with the solvent (correct)
To add more color to the chromatography paper

What is the purpose of taping the other end of the chromatography paper to a pencil?

To secure the paper in place (correct)
To make the paper curly
To add weight to the paper
To make the paper more visible

How long should the chromatography process take?

15 minutes (B) Signup and view all the answers

What is the purpose of repeating the experiment with different types of black ink pen/marker?

To analyze the components of different inks (B) Signup and view all the answers

What is the main objective of paper chromatography?

To identify an unknown compound by comparing it to known compounds (D) Signup and view all the answers

What is the stationary phase in paper chromatography?

The paper before the solvents start to move up (D) Signup and view all the answers

What allows the solvent to travel up the paper in paper chromatography?

Capillary action (B) Signup and view all the answers

What determines how quickly a pigment travels up the paper in paper chromatography?

The solubility of the pigment in the polar solvent (A) Signup and view all the answers

What is the purpose of using a polar solvent in paper chromatography?

To separate the pigments based on their solubility (D) Signup and view all the answers

What can be used as a substitute for chromatography paper in paper chromatography?

White paper towels (C) Signup and view all the answers