Paper Chromatography

What is chromatography?

• A technique used to separate substances in a mixture

• A technique used to identify substances in a mixture

• A technique used to dissolve substances in a mixture

• A technique used to evaporate substances in a mixture

Which type of chromatography is used to separate dyes in ink?

• Gas chromatography

• Liquid chromatography

• Paper chromatography

• Thin-layer chromatography

What is the purpose of the baseline in paper chromatography?

• To mark the starting point for the solvent

• To measure the distance traveled by the solvent

• To indicate the end point of the experiment

• To calculate the rf value

What is the mobile phase in paper chromatography?

• The substance that the molecules can move in

• The substance that the molecules can't move in

• The solvent used in the experiment

• The paper used in the experiment

What is the stationary phase in paper chromatography?

• The substance that the molecules can move in

• The substance that the molecules can't move in

• The solvent used in the experiment

• The paper used in the experiment

Why do different chemicals move up the paper at different rates in paper chromatography?

• Because they dissolve in the solvent

• Because they bind to the paper

• Because they spend different amounts of time in the mobile and stationary phases

• Because they are attracted to the solvent

What is a chromatogram?

• The pattern of spots left on the paper after the experiment

• The solvent used in the experiment

• The distance traveled by the solvent

• The distance traveled by the substance

What is the Rf value in paper chromatography?

• The distance traveled by the substance divided by the distance traveled by the solvent

• The distance traveled by the solvent divided by the distance traveled by the substance

• The distance traveled by the substance multiplied by the distance traveled by the solvent

• The distance traveled by the solvent multiplied by the distance traveled by the substance

What happens when paper chromatography is done with a pure substance?

• The substance separates into different components

• The substance does not separate at all

• The substance evaporates

• The substance dissolves completely

Why might the chromatogram look different if the same substance is tested with a different solvent or paper?

• Because the substance will dissolve differently in the new solvent

• Because the substance will bind differently to the new paper

• Because the mobile and stationary phases will change

• Because the rf value will be different