IB Chemistry Internal Assessment Ideas
1. Acid - Base Back Titration
How does the temperature affect the extent demineralization of calcium hydroxyapatite (a mineral found in the tooth) as it reacts with organic-based acid (citric acid/ethanoic acid/oxalic acid or tartaric acid) as quantified by complexometric titration?
Topics covered : Acid - Base (Topic 8/18) & Transition Metal Chemistry (Topic 13)
Experimental Technique : Titration
Independent variable: Temperature (At least 5)
Dependent variable : Percentage of dimineralisation
Difficulty scale : High
2. Acid - Base Complexometric Titration
How does the temperature affect the extent demineralization of calcium hydroxyapatite (a mineral found in the tooth) as it reacts with organic-based acid (citric acid/ethanoic acid/oxalic acid or tartaric acid) as quantified by complexometric titration?
Topics covered : Acid - Base (Topic 8/18) & Transition Metal Chemistry (Topic 13)
Experimental Technique : Titration
Independent variable: Temperature (At least 5)
Dependent variable : Percentage of dimineralisation
Difficulty scale : High
3. Organic Chemistry & Transition Metal
How does the temperature affect the extent of hydrolysis of aspirin as quantified by the complexation with transition metal ion using UV-Vis Spectrometer?
Topics covered : Organic Chemistry (Topic 10 / 20) & Transition Metal Chemistry (Topic 13)
Experimental Technique : Calibration Curve & Use of Colorimeter
Independent variable: Temperature (At least 5)
Dependent variable : Extent of hydrolysis (measured from the concentration of salicylic acid)
Difficulty scale : Medium
4. Periodicity & Energetics
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) & Energetics (Topic 5/15)
Experimental Technique : Precipitation
Independent variable: Ionic Radii of metal ion with +2 charge (At least 5)
Dependent variable : Mass of gelatin produced
Difficulty scale : Medium
5. Acid - Bases & Energetics
How does the pH affect the cross-linkings between sodium alginate and calcium chloride as measured by the mass of gelatin produced??
Topics covered : Acid & Bases (Topic 8/18) & Energetics (Topic 5/15)
Experimental Technique : Precipitation
Independent variable: pH (At least 5)
Dependent variable : Mass of gelatin produced
Difficulty scale : Medium
6. Reaction Kinetics & Decomposition
How does the d-electron number of different transition metal ion homogenous catalyst affect the rate of decomposition of hydrogen peroxide as quantified by gas collection of the oxygen gas produced
Topics covered : Transition Metal Chemistry (Topic 13) & Kinetics (Topic 6/16)
Experimental Technique : Gas Collection or Oxygen Sensor
Independent variable: d-electron number of transition metal ion At least 5)
Dependent variable : Rate of Decomposition of Hydrogen Peroxide produced
Difficulty scale : Medium
7. Organic Chemistry & Energetics
How does the number of carbon affect the extent of enthalpy change during the combustion of aliphatic mono-alcohols?
Topics covered : Organic Chemistry (Topic 10/20) & Energetics (Topic 5/15)
Experimental Technique : Gas Collection or Oxygen Sensor
Independent variable: Aliphatic alcohols (At least 5)
Dependent variable : Enthalpy change of combustion
Difficulty scale : Medium
8. Acid - Bases & Kinetics
How does the pH of water affect the adsorption extent (water vapour) of activated charcoal?
Topics covered : Acid & Bases (Topic 8/18) & Kinetics (Topic 6/16)
Experimental Technique : Adsorption
Independent variable: pH (At least 5)
Dependent variable : Increase in mass of activated charcoal
Difficulty scale : Medium
9. Redox & Transition Metal Chemistry
How does the duration spent boiling measured in minutes affect the amount of extractable Iron content in spinach (Spinacia oleracea)?
Topics covered : Organic Chemistry (Topic 10/20) & Transitional Metal Chemistry (Topic 13)
Experimental Technique : Spectrophotometer
Independent variable: Duration of boiling (At least 5)
Dependent variable : Iron content in mass
Difficulty scale : Medium
10. Acid-Bases & Redox
How does the change in temperature affect the free SO2 concentration in preserved food as quantified by (iodine-starch titration)?
Topics covered :Acid & Bases (Topic 8/18) & Redox (Topic 9/19)
Experimental Technique : Redox Titration
Independent variable: Temperature (At least 5)
Dependent variable : Free SO2 concentration
Difficulty scale : Medium