The effect of changing the sugar concentration (25%, 17%, 13%, 8%, 4%, 0%) on the pressure of carbonated water.
IA
Level: 5
SL
Investigating effect of using different feedstock on the percentage yields and characteristics of biodiesel produced through transesterification of oils and fats
IA
Level: 4
SL
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
Level: 5
SL
Investigating the effects of different Salt Bridges on the Voltage and Discharge Time of a Galvanic Cell
IA
Level: 5
SL
How does the number of dichloromethane extraction cycles (1, 2, 3, 4) with a fixed volume influence the total mass of caffeine extracted from coffee?
IA
Level: 5
SL
How does increasing temperature (30 °C, 35 °C, 40 °C, 45 °C, and 50 °C(0.5°C)) affect the buffering capacity of a bicarbonate buffer solution in resisting changes in 100 mL of 0.1 mol/dm³ HCl, as determined by pH change in acid-base titration ?
IA
Level: 6
SL
How the voltage supplied (4,6,8,10,12,14V) to aluminium cathode in aqueous sulfuric acid affects the increase in mass (in grams) of aluminium oxide deposited at the aluminium anode.
IA
Level: 4
SL
Investigating the Effect of Proteins such as Albumin and Sugars such as Glucose on Calcium Oxalate Precipitation in Synthetic Urine
IA
Level: 3
SL
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)?
IA
Level: 5
SL
How does the electrolysis time (1 min, 2 min, 3 min, 4 min, 5 min) affect the amount of copper transferred onto a paper clip through electrolysis in a copper sulphate solution?
IA
Level: 5
SL
Examination of the correlation between temperature and the equilibrium constant of the iron (III) thiocyanate complex reaction.
IA
Level: 4
SL
How do the concentrations (0.05, 0.10, 0.15, 0.20, 0.25) 0.001 mol dm⁻³ of 100 cm³ aqueous sodium chloride solution affect the volume of hydrogen gas (cm³) collected at the cathode in the Hoffman apparatus after 5.00 0.01 minutes of electrolysis using a 10V power supply?
IA
SL
Pro
How does the degree of unsaturation in different edible lipids ( palm, olive, coconut, sunflower, and canola oils) affect their susceptibility to oxidation when subjected to heat and atmospheric oxygen, as measured by peroxide value determined via iodometric titration?
IA
SL
Pro
How does the concentration of aqueous sodium chloride (NaCl) affect the freezing point (Tf of the NaCl solution, measured in °C) of the solution?
IA
SL
Pro
Is there a difference in the degree of unsaturation of five named vegetable oil types (sunflower, olive, canola, soybean, and coconut) measured by iodine value determined through iodometric titration?
IA
SL
Pro
How does the duration of boiling (0, 2, 4, 6, 8, 10 minutes)± 0 . 01 𝑠 affect the vitamin C content (mg/100 g) in spinach, as determined by redox titration using 0.005± 0 . 779% M iodine solution and starch indicator?
IA
SL
Pro
How does the solubility of aspirin in water (expressed as maximum mass dissolved in 1 dm3) vary with temperature (20, 25, 30, 35, 40, 45 ºC), determined by back-titration of excess NaOH with HCl solution?
IA
SL
Pro
How does ethanol percentage (0%, 20%, 40%, 60%, 80%) in the aqueous phase affect the partition coefficient of aspirin between water and oil phase determined through back titration?
IA
SL
Pro
What is the effect of changing temperature (20.0, 30.0, 40.0, 50.0, and 60.0 °C) on the rate of reaction between magnesium and hydrochloric acid, measured by recording the pressure change at varying temperatures, and used to calculate the activation energy?
IA
SL
Pro
To Determine the Buffer Capacity of Ethanoic Acid/Ethanoate Buffer Solution at Different Buffer Ratios
IA
SL
Pro
How can the concentration (moldm-3) of an unknown dilute hydrochloric acid solution be determined by constructing a calibration curve of reaction rate against concentration, using the reaction between 0.100 O.O1M sodium thiosulfate and standard hydrochloric acid solutions of concentrations 0.050, 0.100, 0.150, 0.200, and 0.250 O.O1 (moldm-3)
IA
SL
Pro
How does the molar concentration of ammonium nitrate, NH₄NO₃ (0.5M, 1.0M, 1.5M, 2.0M, 2.5M ± 0.01 mol dm⁻³), affect the temperature change (ΔT, °C) and enthalpy of dissolution (ΔH°sol, kJ mol⁻¹), measured using a simple calorimeter?
IA
SL
Pro
To what extent does the brand of calcium carbonate-based antacid tablet ( Rennie, Tums, Settlers, Quick Eze, and Rolaids) affect the mass of calcium carbonate per tablet, determined by back titration with 50.0 cm³ of 0.15 mol dm⁻³ HCl and 0.10 mol dm⁻³ NaOH at 25 ± 2 °C?
IA
SL
Pro
Research Question: How does the concentration of copper (II) sulfate solution at (0.1 , 0.2, 0.3, 0.4 and 0.5) M (±0.03) M affect the amount voltage produced by a zinc- copper voltaic cell
IA
SL
Pro
