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How does temperature (ranging from 10℃ to 50℃) affect the rate of the iodine clock reaction, and what is the relationship between temperature and reaction rate? Specifically, how can the reaction rate be determined from the time taken to reach the blue-black endpoint, and how can this data be analysed using the Arrhenius equation to estimate the activation energy of the reaction?
Chemistry
IA
5
HL
Pro
Investigation into how varied temperature (20℃, 30℃, 40℃, 50℃, 60℃, 70℃) affect the bleaching capacity of sodium hypochlorite in removing protein-based stains (egg-yolk) from 100% cotton fabric, measured by the ΔE value obtained using the Color Identifier Colorimeter app?
Chemistry
IA
6
SL
Pro
How does varying the concentration of Iron(III) chloride affect the rate of hydrogen peroxide decomposition?
Chemistry
IA
4
SL
Pro
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
Pro
How does the temperature (50.0,60.0,70.0,80.0,90.0 °C) of Acetylsalicylic acid synthesis from Salicylic Acid and Acetic anhydride affect its % yield and purity (determined by the Iron (III) Chloride test and the melting-point of the Acetylsalicylic acid crystals)?
Chemistry
IA
5
SL
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
Pro
To what extent do different temperatures (29℃, 37℃, 45℃) affect the aspirin (acetylsalicylic acid) concentration during reaction with stomach acid (HCl)?
Chemistry
IA
5
HL
Pro
"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
Pro
Investigating the Effect of Ionic Charge of Cation towards the Enthalpy of Solution of Salts
Chemistry
IA
5
SL
Pro
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
Pro