Zusammenfassung der Ressource
OCR C7 analysis, chromatography and titrations
- analytical procedures
- know the difference between qualitative and quantitative
- be familiar with how samples are analysed in the lab
- chromatography
- what is it?
- mobile phase
- stationary phase
- aqueous and non aqueous solvents
- how does it work (dynamic equilibrium)
- how does it separate?
- using a reference database of materials
- compare paper and thin layer chromatography
- calculate RF value
- locating agents
- gas chromatography
- how it works
- retention time
- interpret results
- titrations
- steps by step procedure
- measure accurately sample volume
- dissolving if needed
- measuring colour change/ volume needed
- concentration is grams per dm3
- how to make a standard solution
- work out concentration from titration results
- degree of uncertainty in results