IB Chemistry Internal Assessment Ideas

1Acid & Bases (Back Titration)
How does the temperature affect the extent demineralization of calcium hydroxyapatite (mineral found in tooth) as it reacts with organic based acid (citric acid/ethanoic acid/oxalic acid or tartaric acid) as quantified by acid-base back titration?
- Topics covered : Acid - Base (Topic 8/18)
- Experimental Technique : Titration
- Independent variable: Temperature (At least 5)
- Dependent variable : Percentage of dimineralisation
Difficulty scale : Medium
2Acid & Bases (Complexometric Titration)
How does the temperature affect the extent demineralization of calcium hydroxyapatite (mineral found in tooth) as it reacts with organic based acid (citric acid/ethanoic acid/oxalic acid or tartaric acid) as quantified by complexometric titration?
- Topics covered : Transition Metal Chemistry (Topic 13)
- Experimental Technique : Titration
- Independent variable: Temperature (At least 5)
- Dependent variable : Percentage of dimineralisation
Difficulty scale : High
3Organic Chemistry & Transition Metal (Colorimeter)
How does the hydrolysis of aspirin under different temperatures affect the concentration of salicylic acid as quantified using complexation with transition metal ion using colorimeter?
- Topics covered : Transition Metal Chemistry (Topic 13)
- Experimental Technique : Calibration Curve & Use of Colorimeter
- Independent variable: Temperature (At least 5)
- Dependent variable : Concentration of salicylic acid
Difficulty scale : Medium
4Periodicity (Precipitation)
How does the ionic radius of doubly charged metal ion affect the amount of gelatin produced when sodium alginate and XCl2 reacts?
- Topics covered : Periodicity (Topic 3)
- Experimental Technique : Precipitation
- Independent variable: Ionic Radii (At least 5)
- Dependent variable : Mass of gelatin produced
Difficulty scale : Medium
5Acid & Bases (Precipitation)
How does the pH affect the cross-linkings between sodium alginate and calcium chloride?
- Topics covered : Acid & Bases (Topic 8)
- Experimental Technique : Precipitation
- Independent variable: pH(At least 5)
- Dependent variable : Mass of gelatin produced
Difficulty scale : Medium
6Reaction Kinetics (Gas Collection / Oxygen Sensor))
How does the d-electron number of different transition metal ion catalyst affect the rate of decomposition of hydrogen peroxide as quantified by gas collection of the oxygen gas produced?
- Topics covered : Reaction Kinetics Topic 6/16)
- Experimental Technique : Gas Collection
- Independent variable: d-electron number (At least 5)
- Dependent variable : Rate of oxygen gas produced
(Alternatively, an oxygen sensor probe can be used instead of gas syringe) Difficulty scale : Medium
7Energetics (Calorimeter)
How does the number of carbon affect the extent of enthalpy change during the combustion of aliphatic mono-alcohols?
- Topics covered : Energetics (Topic 5/15)
- Experimental Technique : Calorimeter
- Independent variable: aliphatic alcohols (At least 5)
- Dependent variable : Enthalpy change
Difficulty scale : Medium
8Reaction Kinetics (Activated Charcoal)
How does the pH of water affect the adsorption extent of activated charcoal?
- Topics covered : Acid & Bases (Topic 8)
- Experimental Technique : Adsorption
- Independent variable: pH(At least 5)
- Dependent variable : Increase in mass of activated charcoal
Difficulty scale : Medium
9Redox (Titration)
How does the duration spent boiling measured in minutes affect the amount of extractable Iron content in spinach (Spinacia oleracea)
- Topics covered : Redox (Topic 9/19)
- Experimental Technique : Titration
- Independent variable: Boiling Time (At least 5)
- Dependent variable : mass of iron extractable
Difficulty scale : Medium
10Redox (Titration)
How does the change in temperature affect the free SO2 concentration in preserved food as quantified by (iodine-starch titration)?
- Topics covered : Redox (Topic 9/19)
- Experimental Technique : Titration
- Independent variable: Temperature (At least 5)
- Dependent variable : Free SO2 concentration
Difficulty scale : Medium

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