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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 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
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 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 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
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
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
A
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
How does the duration of 800W microwave exposure affect the rate of acetaminophen hydrolysis in the presence of acidified iron(III) chloride (FeCl3)(aq), measured by quantifying the iron(III)+p-aminophenol complex ion in alkaline conditions?
Chemistry
EE
B
Pro
“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