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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
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
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
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 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
Examining the effect of temperature on the rate of reaction and determining activation energy using the Arrhenius Plot.
Chemistry
IA
4
SL
Pro
How do solutions with a different pH (4, 6, 7, 8, 10) affect the amount of calcium carbonate (in moles) remineralised when left in a fluoride toothpaste solution, as measured by changes in the absorbance value using a colourimeter set to 430nm?
Chemistry
IA
5
HL
Pro
Investigating The Content of Tannin in Tea Affected by Steeping Time Using a Colorimeter
Chemistry
IA
3
HL
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 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
Pro