Easy question on chromatography Drawing B shows what the finished chromatogram looked like. Sam has drawn lines on it to help her to see which blobs are level with each other.

2 Three of the inks have only one colour in them.

a Which three are they?

b Explain your answer.

3 a Which inks are mixed to make ink C?

b Which inks are mixed to make ink D?

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.

the dissolution of polymer can be thermodynamically described in 2 steps.