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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 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
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 does the transmission of UV light through coloured light filters affect the concentration of linalool during the storage of extracted Basil oil, dissolved in ethanol, as measured by Gas Chromatography Mass Spectrometry?
Chemistry
EE
B
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
How does 125ml solution of hydrochloric acid in varying concentrations (10%, 20%, 40%, 60%, 80%, 100%) affect the corrosion rate of different iron based alloy screws after 2 hours of submersion?
Chemistry
EE
B
Pro
¿En qué medida afectan diferentes métodos de cocción como el hervido, el salteado y al vapor, y variaciones en el pH al contenido de clorofila en las espinacas, antocianinas en las remolachas y carotenoides en las zanahorias?
Chemistry
EE
C
Pro
How does pH (3, 5, 7, 9, 11) affect the equilibrium adsorption capacity of 10 ppm methylene blue onto 0.5g of granular activated carbon, and which kinetic model, pseudo-first-order or pseudo-second-order, best describes this process?
Chemistry
EE
B
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
“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?
Chemistry
EE
C