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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 exemplar scored C

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.

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 exemplar scored B

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?

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 exemplar scored B

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?

How Does the Temperature and Pressure of Water Used to Brew Ground Coffee Affect the Caffeine Concentration in the Final Product? - Chemistry EE exemplar scored D

How Does the Temperature and Pressure of Water Used to Brew Ground Coffee Affect the Caffeine Concentration in the Final Product?

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 exemplar scored C

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.

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 exemplar scored C

Investigating the effect of the chain length, position of the functional group and the calorimeter design on the enthalpy of combustion of alcohols

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 exemplar scored B

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?

To what extent do temperature, the availability of light, and the availability of
oxygen relatively affect the rate of vitamin C degradation in 20 ml sample solutions prepared from
vitamin C tablets during 2 weeks of storage? - Chemistry EE exemplar scored A

To what extent do temperature, the availability of light, and the availability of oxygen relatively affect the rate of vitamin C degradation in 20 ml sample solutions prepared from vitamin C tablets during 2 weeks of storage?

To what extent does the thickness of an electrophoretically deposited (EPD) reduced graphene oxide (rGO) coating affect the electrical conductivity of copper (Cu) wire? - Chemistry EE exemplar scored A

To what extent does the thickness of an electrophoretically deposited (EPD) reduced graphene oxide (rGO) coating affect the electrical conductivity of copper (Cu) wire?

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 exemplar scored C

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?