Free Unit 2 & Unit 4 Chemistry Resources
Acid-Base Titrations
Notes:
Indicators Used in Acid-Base Titrations
Tests:
Standard Solutions & Primary Standards – Topic Test 1
Titration Errors – Topic Test 1
Titration Curves – Topic Test 1
Acid-Base Titrations – Topic Test 1
Pracs:
The Ammonia Content of ‘Cloudy Ammonia’
Acetic Acid Content of Vinegar
Analysis of Vinegar & Analysis of a Carbonate/Bicarbonate Mixture
IR Spectroscopy
Notes:
IR Spectra: Tricks for Identifying the 5 Zones
Tests:
NMR Spectroscopy
Notes:
Nuclear Magnetic Resonance (NMR) Spectroscopy
Tests:
NMR Spectroscopy – Concept Test (C & H NMR)
C-13 NMR Spectroscopy – Concept Test
Proton NMR Spectroscopy – Concept Test
Worksheets:
Topic 20 Exercise 2 – Carbon-13 NMR Spectra
Redox Titrations
Notes:
Tests:
Redox Titrations – Topic Test 1
Redox Titrations – Topic Test 2
Pracs:
Determination of the Alcohol Content of Wine
Determination of the Iron (II) Content in Lawn Fertiliser by Redox Titration
Determination of Vitamin C Content in Tablets
The Concentration of Vitamin C in Various Substances Through Redox Titration
HPLC
Notes:
High Performance Liquid Chromatography
Order of Elution of Sample Components
Worksheets:
Dynamic Science – Chromatography
Tests:
Pracs:
Determination of Caffeine in Soda
Determination of the Caffeine Content in Soft Drinks
Determination of the Caffeine Content in Commercial Tea Samples
Quantitative Analysis of Caffeine
Mixed Instrumental Techniques
Note: You may need the molecular weight of a compound in order to solve some questions.
Simply read the m/z value for the decently sized peak on the right hand side of the spectrum. In the below example, the answer is 32. Ignore tiny peaks like the one at m/z 33. Sometimes, you will get the answer wrong – but you will only be 1-2 amu from the true value. That should be enough information for you to solve these questions.

Notes:
Introduction to Structure Determination
Combination of Different Analytical Techniques to Determine Structure
Worksheets:
Chemical Detectives – Spectra – Easy – Test 1
Chemical Detectives – Spectra – Easy – Test 2
Chemical Detectives – Spectra – Easy – Test 3
Chemical Detectives – Spectra – Medium – Test 1
Chemical Detectives – Spectra – Medium – Test 2
Chemical Detectives – Spectra – Hard – Test 1