1. Chemistry Assessment 34% SAC 33%Exam 1 33% Exam 2
3 SACs per Semester
Extended investigation (50 marks)
Written report (25 marks)
Response to stimulus material, Q and A. (25 marks)

2. Extended investigation
Contents in fertilizer Sulfur, nitrogen and iron contents through gravimetric analysis, back titration and redox titration.
Written report- esters
Response to stimulus material test - DNA

3. Analytical Chemistry
Must Must Must Review this chapter in detail at home as we don’t have enough time in class!

4. Analytical Technique Depends on:
Nature of sample
Nature of chemical
Concentration of that chemical
Accuracy required
Time available
Cost benefits

6. Week 1 Unit 3 Chemistry Key Knowledge
Chemical analysis in action, some case studies
Qualitative and quantitative analysis
1, 5, 8
Analytical techniques utilise chemical and physical properties of substances
Overview of analytical techniques 2
Measuring water content 5
Review the mole concept general gas equation, molar volume
6, 7, 9, 19, 20, 23
Review determination of empirical and molecular formula
10, 12, 13, 24, 34, 47
Calculations involving mass of reactants and products
15, 16, 26, 28
Using gravimetric analysis to find the composition of a mixture
17, 44, 46, 48

7. Measuring Water Content
Percentage of water in a sample can be determined by heating the sample at 110 degrees until there is no change in mass. “Heating to constant mass”
What formula do we use to determine %mass?

9. THE MOLE
You need to
Know what
Each of these
Letters
represent

10. More Revision
Molar Volume of a gas-dependant on pressure and temperature
At “standard temperature and pressure” (STP 0˚C and 1atm) the molar V is 22.4L /mol
At “standard laboratory conditions” SLC 25˚C and 1 atm 24.5L/mol

11. And more Revision Empirical formulas
“Percentage to Mass, Mass to Moles divide by smallest multiply til whole”
Molecular Formulas