Loading exemplars...
To what extent can various analytical methods, such as Spectrophotometry, Gravimetry, and Iodometric Titration, accurately measure copper content in brass alloys, and what are the implications of their respective strengths and limitations on the accuracy and precision of the obtained results?
Chemistry
EE
C
HL
Pro
How does the polarity of the different solvents (hexane, dichloromethane, chloroform, diethyl ether, ethanol, ethyl acetate, acetone) affect the amount of extracted caffeine? A determination by iodometric titration.
Chemistry
EE
C
Pro
How successful is ZnO as a photocatalyst at removing C13H18O2, Ibuprofen from wastewater, with the greatest efficiency, within the range?
Chemistry
EE
C
Pro
Investigating the effect of the chain length, position of the functional group and the calorimeter design on the enthalpy of combustion of alcohols
Chemistry
EE
C
“How do varying concentrations of eggshell powder adsorbent (1.00, 2.00, 3.00, 4.00, 5.00 grams) alongside the adsorption duration (5, 10, 15, 20, 25, 30 minutes) affect its efficacy on the concentration of manganese(VII) ions in wastewater?”
Chemistry
EE
A
Pro
How does the bioethanol yield (ml) from the fermentation of 1.5kg of corn, potato, and sugarcane differ under controlled conditions, and what factors influence the efficiency of production?
Chemistry
EE
B
How does the magnitude of ionic radii of cations, specifically Sodium (Na+), Magnesium (Mg2+), Calcium (Ca2+), and Potassium (K+), in chloride salts, affect the corrosion rate on an iron nail as measured through immersion tests and spectrophotometry over 6 days?
Chemistry
EE
B
Pro
To what extent does the unsaturation level of fats in Hokubee Meltique Meat, affect the cardiovascular health of an average adult?
Chemistry
EE
C
Pro
How does changing the time in 5 minute intervals (0, 5, 10, 15, 20, 25 minutes) for which 3 grams of Phaseolus vulgaris (Lightly speckled kidney beans) are simmered affect its iron content in milligrams as determined by spectrophotometric methods using a wavelength of 477.1 nm?
Chemistry
EE
C
Pro
To what extent does the concentration of ethanol (0-50%) affect the rate of hydrolysis of aspirin, as determined via visible spectrophotometry. Furthermore, investigate the effect of molecular structure in terms of the number and position of hydroxyl groups of 3 carbon chain alcohols (propan-1-ol, propan-2ol, propylene glycol and glycerol) at 50% concentration on the above.
Chemistry
EE
C
Pro