How does temperature (5.0ºC, 10.0ºC, 15.0ºC, 20.0ºC, 25.0ºC, 30.0ºC, 35.0ºC, 40.0ºC) affect the concentration of dissolved oxygen (mg/dm3) in 20.00cm3 of deionised water, measured using Winkler's titration method?
Chemistry
IA
7
HL
How does the boiling time (0.00, 240.00, 480.00, 720.00, 960.00, 1200.00 seconds) affect the amount of ionic calcium (in mg) in cow’s milk determined using Ethylenediaminetetraacetic acid (EDTA) complexometric back titration using Eriochrome Black T indicator?
Chemistry
IA
7
HL
As determined by the reaction rate constant, which catalyst from baker’s yeast, baking powder, and manganese (IV) oxide is the most effective at catalyzing the decomposition of 3% hydrogen peroxide?
Chemistry
IA
7
HL
How do the steeping times (30, 60, 90, 120 and 150 seconds) of tea affect its caffeine content using dichloromethane in a separating funnel?
Chemistry
IA
7
SL
What is the effect of the cooking temperature (10, 30, 60, 80, 100 ºC) of Brassica rapa subsp. chinensis on its content of calcium ions (mg), as measured by the titration volume of 0.01M EDTA (Ethylenediaminetetraacetic acid) required to completely react with calcium (II) ions in a solution of Brassica rapa subsp. chinensis after cooking it for 5 minutes?
Chemistry
IA
6
SL
How Do Different Agar Adsorbents (Agar-agar, Agar With Activated Carbon, Agar With Iron(III) Oxide (Fe2O3), Agar With Zinc Oxide (ZnO) and Agar With Manganese(IV) Oxide (MnO2)) Affect the Concentration (mg/dm3) of Methylene Blue Dye in Water After 24 Hours?
Chemistry
IA
6
HL
"How does the temperature change (20°C, 40°C, 60°C, 80°C and 100°C) affect calcium concentration (mg) in soya milk, measured by using Ethylenediaminetetraacetic acid (EDTA) Complexometric titration?”
Chemistry
IA
6
SL
How will heating lemon juice to different temperatures (60, 70, 80, 90, 100 degrees celsius) affect its concentration of ascorbic acid (vitamin C)?
Chemistry
IA
4
SL
How does changing the concentration of copper (II) sulphate solution (0.2M, 0.4M, 0.6M, 0.8M, and 1.0M) affect the voltage of a copper-magnesium galvanic cell at constant concentration of magnesium sulphate solution, temperature of copper sulphate and magnesium sulphate solution, and concentration of potassium nitrate solution, measured by a voltmeter?
Chemistry
IA
6
SL
How does heating different cooking oils (olive oil, sunflower oil, and canola oil) at temperatures of (40°C, 60°C and 80°C) for 30 minutes affect their acid value and free fatty acid content, as determined by acid-base titration?
Chemistry
IA
6
SL