IB Chemistry SL 2.2.10 Chromatography Questions

Use exam questions to calculate and interpret Rf values and explain separation through competing phase attractions.

Exam points

Calculate Rf by dividing a spot's distance from the baseline by the solvent-front distance.
Explain separation by comparing each component’s attractions to the mobile and stationary phases, linking stronger stationary-phase attraction to less movement.
Use Rf or retention data to identify components and interpret how solvent polarity or phase interactions change their movement.

Learn this topic

Study 2.2.10—Chromatography conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

[Maximum number: 1]

Proteins are made of long chains of amino acids.

A mixture of amino acids was spotted onto chromatography paper and eluted with a solvent mixture. The following spots were seen after the paper had been developed with ninhydrin.

Figure for Question IB Chemistry SL 2.2.10 Chromatography Questions question 1 — IB Chemistry SL

Determine the $R_{\mathrm{f}}$ value of the amino acid marked as X .

All question bank results loaded

Learn this topic

IB Chemistry SL 2.2.10 Chromatography Questions question 1