‹ Science Essentials
Chemical analysis
Purity and formulations, chromatography and Rf values, tests for gases, and for separate Chemistry the tests for ions and flame emission spectroscopy.
Start: Pure substances and formulations About 21 min
Lessons
Practice and tests
By the end you can
Use melting and boiling point data to tell pure substances from impure ones Calculate percentages and masses of the components in a formulation Carry out chromatography, calculate Rf values and read a chromatogram Describe the tests for hydrogen, oxygen, carbon dioxide and chlorine Identify metal ions and negative ions from test results (Chemistry only) Read line spectra and calibration lines from flame emission spectroscopy (Chemistry only) Helps with: GCSE (AQA, Edexcel, OCR)
Next unit: The Earth's atmosphere Previous unit: Organic chemistry
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