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Let us consider another form of separation. We take a filter paper and add a drop of ink to it. The ink is made up of water and two other substances that are both dissolved in the water.

Substance B dissolves much more easily than Substance A in water. We place this paper in a beaker of water. The water rises along the paper.
As the water continues to rise along the filter paper, it comes into contact with the ink. What happens to the ink when the water goes past the ink drop?
  • More of Substance A dissolves in the water and it moves up with the water
  • More of Substance B dissolves in the water and it moves up with the water
  • Both substances dissolve equally in the water and both move up with the water
  • Nothing happens to the substances as the water moves up