Rf calculation and identification
What Rf calculation and identification means in Chemistry A-Level, as defined for OCR.
Definition of Rf calculation and identification
Check what you remember
Read the wording for your board, then hide it and explain Rf calculation and identification in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
The retention factor is the distance travelled by the component divided by the distance travelled by the solvent front, and it is compared with known values to identify components.
Topics that use Rf calculation and identification
- Use of apparatus and techniques (OCR A-Level)
Related terms
- Calculating and interpreting the titre
- Cation tests with sodium hydroxide
- Clock reaction
- Collecting data over time to determine rate
- Condenser water flow and safety
- Continuous monitoring method
- Controlling variables to isolate concentration effects
- Correct reading technique for scales
Using Rf calculation and identification in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Chemistry questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
A week of Premium from your first lesson · Then the free plan continues · No card, no charge