Chemistry A-Level
Melting point as a purity indicator
What Melting point as a purity indicator means in Chemistry A-Level, as defined for OCR.
Definition of Melting point as a purity indicator
Check what you remember
Read the wording for your board, then hide it and explain Melting point as a purity indicator in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
A pure solid melts sharply over a narrow range close to its literature melting point, while an impurity widens the melting range and usually lowers the melting point.
Topics that use Melting point as a purity indicator
- 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 Melting point as a purity indicator 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.
Start free
All Chemistry A-Level termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge