Sample question 3 - Higher. Question. Use the diagram of the chromatogram below to calculate the Rf value of the blue ink. [3 marks]. Five inks and a starting ...

In this GCSE Chemistry Revision Guide, you will find high quality Chromatography and Rf Values GCSE Revision Notes and Past Paper Questions. Rf Values · Differences Between Rf Values

Which will definitely produce a smaller Rf value if the solvent and paper are both changed? Tick (✓) one box. The dye is less soluble in the new solvent and.

1. Which suspected components (X, Y or Z) are present in the sample? ; 2. Are there other components in the sample? ; 3. What is the Rf value of the unidentified ...

(i) Which spot has the highest Rf value in solvent 1? (ii) Which spot has the highest Rf value in solvent 2? (iii) Which spot has the lowest Rf value in solvent ...

Figure 2 shows the student's results. The result for dye D is not shown. Calculate the Rf value of dye A. Give your answer to two significant figures.

Six-mark questions are extended free response questions, needing the longest answers. It is wise to plan your answer rather than rushing straight into it.

Pigment p has a Rf value of 0.8. Calculate how far it moved up the paper. h. Explain why pigment D has not moved up the paper. i. What is ...

24 сент. 2024 г. · Learn how to calculate Rf values for your IGCSE chemistry using our revision notes. Understand the role of locating agents in chromatography ...

Chromatography can be used to separate components of a mixture. (a) A student used paper chromatography to analyse a black food colouring. The student placed ...