Paper Chromatography

• What analytical technique is used to separate substances in a mixture?

  Chromatography
• What is the specific type of chromatography discussed in the video?

  Paper chromatography
• What is the purpose of paper chromatography?

  To separate different dyes in ink
• What is the first step in paper chromatography?

  Draw a baseline with a pencil
• Why is the solvent level kept shallow in paper chromatography?

  To avoid submerging the pencil line
• What happens to the different dyes during chromatography?

  They travel at different rates up the paper
• What is the term for the pattern of spots left after chromatography?

  Chromatogram
• What are the two phases involved in chromatography?

  Mobile phase and stationary phase
• What is the mobile phase in paper chromatography?

  The solvent used in the process
• What is the stationary phase in paper chromatography?

  The filter paper used in the process
• How do different chemicals behave in the mobile and stationary phases?

  They dissolve and bind repeatedly
• What determines how fast a chemical moves up the paper?

  Solubility in the solvent and attraction to paper
• What does the rf value represent in chromatography?

  Ratio of substance distance to solvent distance
• If a pink substance traveled 6 cm and the solvent traveled 10 cm, what is the rf value?

  $0.6$
• What happens when chromatography is performed with a pure substance?

  It produces a single spot on the chromatogram
• How can changing the solvent or paper affect chromatography results?

  It can change the chromatogram and rf value
• What must a chemist consider when looking up an rf value?

  The solvent and type of paper used
• What should you do if you enjoyed the video?

  Like and subscribe