Zadanie 7
A leaf extract is separated by chromatography. Which band has the greatest retention factor (Rf) in this run? A. The yellow-green band B. The blue-green band C. The orange band D. The yellow band
- Materiał graficzny
Interpret chromatograms, calculate retention factors and use pigment colour and reference values for identification.
Tę umiejętność sprawdza 7 zadań wzorowanych na arkuszach IB z lat 2024–2026.
A leaf extract is separated by chromatography. Which band has the greatest retention factor (Rf) in this run? A. The yellow-green band B. The blue-green band C. The orange band D. The yellow band
A reference substance R has Rf = 0.50 in this solvent system. Use its position and the table to identify the two labelled leaf-pigment bands. Pigment | Reference Rf in this solvent Chlorophyll b | 0.40 Chlorophyll a | 0.70 Phaeophytin | 0.82 Carotene |…
State a technique for separating pigments in a leaf extract.
Describe how the algae’s photosynthetic pigments could be identified.
Identify the pigment most soluble in the solvent used.
Describe how such a chromatogram can be obtained.
State how the Rf value is calculated.
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