To what extent does the thickness of an electrophoretically deposited (EPD) reduced graphene oxide (rGO) coating affect the electrical conductivity of copper (Cu) wire?
EE
A
How does the presence of the catalyst Copper (II) Sulfate and Iron (II) Sulfate affect the activation energy of the reaction Iron (III) Nitrate and Sodium Thiosulfate?
IA
6
HL
The effect of changing the sugar concentration (25%, 17%, 13%, 8%, 4%, 0%) on the pressure of carbonated water.
IA
5
SL
“To what extent do 100.00g of different types of oils (sunflower oil, palm oil, peanut oil, coconut oil, and olive oil) with their saponification values affect the pH, being closest to 7, and rate of curing of soap after 3 weeks of curing during the saponification process, conducted at a constant temperature of 50°C for 30 minutes?
EE
C
How do varying water bath temperatures (15℃, 20℃, 25℃, 30℃, 35℃) influence the oxidation rate of ethanol by potassium permanganate in a basic medium, as measured by red light absorption at 650 nm?
IA
4
HL
How does zinc nitrate concentration (Zn (NO3)2), affect instantaneous cell potential (V) of a copper-zinc voltaic cell, according to the Nernst equation?
IA
6
HL
Deducing the order of reaction of degradation of vitamin C/ascorbic acid in Lemon
IA
6
HL
Investigating The Content of Tannin in Tea Affected by Steeping Time Using a Colorimeter
IA
3
HL
What is the impact of increasing reactant concentrations (mol dm-3) on the rate of light production of luminol? (lx s-1)?
IA
5
HL
Investigating the effects of temperature on the fading of phenolphthalein in extremely alkaline conditions
IA
6
HL
How does the temperature of the water affect the solubilities of magnesium salts magnesium dichloride hexahydrate and magnesium nitrate hexahydrate, as measured by the crystallisation temperatures of the solution at manipulated concentrations?
IA
6
HL
What is the relationship between the length of a carbon chain of ethanol, propan-2-ol, butanol and its enthalpy of combustion?
IA
5
HL
Investigating, how time of ripening (0, 1, 2, 3, 4 days) and external factors (SATP surrounding, wrapping stems in aluminum foil, putting objects in closed paper bag) affect the glucose concentration in bananas (Musa acuminata), using refractometry as a method
IA
6
HL
Investigating effect of using different feedstock on the percentage yields and characteristics of biodiesel produced through transesterification of oils and fats
IA
4
SL
Determining the rate order of copper sulphate during the oxidation of luminol by hydrogen peroxide.
IA
6
HL
What is the effect of the time of cooking on vitamin C content of potatoes (Solanum tuberosum), measured by titration against an iodine solution?
IA
4
HL
Investigating How Apple Juice Brand Selection Affects Vitamin C Concentration Intake in Relation to Meeting Daily Nutritional Requirements
IA
5
HL
Investigating the varying temperatures (298.05K, 300.95K, 303.15K, 305.5K, 310.15K, 313.15K) on the rate of reaction of decomposition of sodium thiosulfate with hydrochloric acid by measuring the time (in seconds) taken for formation of a yellow precipitate.
IA
5
SL
To what extent does temperature (10 oC, 25 oC, 50 oC, 80 oC) affect vitamin C (ascorbic acid) concentration in orange juice measured by redox titration
IA
5
HL
What is the order of reaction with respect to sodium thiosulfate and hydrochloric acid in their reaction, as determined by varying concentrations of each reactant(while the other is kept consistent) and measuring the time taken for sulfur to precipitate, changing the solution from clear to opaque?
IA
4
HL
How does varying the roasting time of Coffea arabica beans (1 min, 5 min, 10 min, 15 min, and 20 min) affect the concentration/extraction of caffeine?
IA
6
HL
How do different concentrations (0.0500 M, 0.100 M, 0.250 M, 0.500 M, 1.00 M) of NaOH(aq) affect the temperature change of the neutralisation reaction with excess 0.500 M HCl(aq) at room temperature using calorimetry, which was then used to determine the amount of Gibbs free energy in kJ mol-1?
IA
5
HL
To what extent does molar mass influence the solubility of common salts, and how do other factors such as atomic radius, lattice enthalpy, and ionic charge compare in their impact on solubility?
IA
5
HL
How does the use of different acid catalysts (H2SO4, HCl, H3PO4, CH3COOH, p-TSA) affect the rate of reaction between potassium iodide (KI), sodium thiosulfate (Na2S2O3) and hydrogen peroxide (H2O2) also known as the iodine clock reaction.
IA
6
HL
