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