What is the solute and solvent in ink?

Ink has water as solvent and dye is soluble(solute) in it.

Is DYE  made of Single color?

No

Dye in ink is made up of different colors mixed together.

 

What is chromatography?

It is a technique used to separate different solutes that dissolve in the same solvent.

This technique is used for separation of different colors .

Example

  • It is used to separate different colors of dye.
  • It is used to separate drugs from bloo
  • It is used to separate different colours from pigments

 

 

How to Separate Different colors of Dye

  1. Take a small strip of filter paper
  2. Draw a line on it (around 3 cm from bottom)
  3. Put a small drop of ink at the center of the line using a sketch pen.
  4. Let it dry
  5. Now take  a beaker filled with some water
  6. Lower the filter paper in the beaker
  7. Lower end of filter paper should dip in water but ink spot should be just above the water
  8. After some times, we see water rise up over the filter paper
  9. Different colors of ink are also visible at different heights

 

Reason :

When water rises up on filter paper, it takes the dye of ink along with it.

  • The component which is more soluble in water rises faster and is seen at higher position
  • The component which is less soluble is seen below at lower position
  1. Class 9
  2. Chapter 2 Class 9 - Is Matter Around Us Pure

About the Author

Davneet Singh's photo - Teacher, Computer Engineer, Marketer
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.