Chromatography (OCR GCSE Chemistry A (Gateway Science Suite)): Quizzes
📚Quizzes
Practise the questions
13 questions from this quiz
ShowHide
Practise the questions
13 questions from this quiz
What is chromatography?
What is chromatography?
A method to separate mixtures
What can the Rf value be used for?
What can the Rf value be used for?
Identifying chemicals in a mixture
How many key components are involved in chromatography?
How many key components are involved in chromatography?
Three
What is the analyte in chromatography?
What is the analyte in chromatography?
The mixture to be separated
What is the stationary phase?
What is the stationary phase?
A solid that stays still
What is the mobile phase?
What is the mobile phase?
A liquid or gas that moves
How do strongly attracted chemicals move in chromatography?
How do strongly attracted chemicals move in chromatography?
Slowly
How do weakly attracted chemicals move?
How do weakly attracted chemicals move?
Quickly
In paper chromatography, what acts as the stationary phase?
In paper chromatography, what acts as the stationary phase?
Chromatography paper
In paper chromatography, what is the mobile phase?
In paper chromatography, what is the mobile phase?
A solvent like water or alcohol
What distance do more polar chemicals travel on chromatography paper?
What distance do more polar chemicals travel on chromatography paper?
Shorter distance
What is the formula for calculating the Rf value?
What is the formula for calculating the Rf value?
What is true about the Rf value for a specific chemical?
What is true about the Rf value for a specific chemical?
Always same under same conditions