Liquid CO2 Extraction of D-Limonene This convenient‚ effective and inexpensive liquid CO2-based extraction of a natural product (D-limonene) provides an engaging example of natural products extraction using an alternative solvent (liquefied CO2). Because the procedure can be carried out in a polypropylene centrifuge tube and uses crushed dry ice as its CO2 source‚ it provides an inexpensive alternative to the equipment-intensive extraction with supercritical CO2. A short video clip is available
Premium Solvent Solubility Solution
completely original; the basic concept has been used multiple times. It uses Beer’s Law: · A is light absorbance · is “molar absorptivity with units of L mol-1 cm-1” · l is the length of the cuvette in centimeters · c is the concentration of the solution in mol L-1 The relationship between absorbance and concentration
Premium Chemistry Concentration Light
Objective/Question/Problem The objective of this project is to see if an egg will float in salt water. The question is how much salt is needed to be added to the water to make the egg float. The problem is that no one knows how much salt is needed to make an egg float. Hypothesis It will take at least three teaspoons of salt to be added to the water for the egg to float. The reason why I think three teaspoons of salt will need to be added to water for the egg to float is because the egg a density
Premium Chemistry Water Solution
area to volume ratio causing them to act more efficiently than the bigger cells. The smallest cell had a ratio of 1:12 while the biggest cell had a ratio of 1:2‚ leaving a gap of 5:12 causing the bigger cell to act less efficient in absorbing the solution in a period of 10 minutes. Also‚ as the size of the cube increased‚ the surface area increased more quickly than the volume such as the difference between the volume of the biggest (3cm) cube and the smallest cube (0.5cm) was only 26.9 ㎤
Premium Chemistry Concentration Solution
Basic Engineering Workshop 1 Exhaust Gas Treatment Index of contents Introduction Waste gas with harmful traces of gas must be burned in an afterburner. To destroy the harmful traces the temperature after the burner must achieve 900°C. The preheater can`t resist a temperature of 700°C. Therefore quench water in a mixer will be used to protect the heat exchanger. The waste gas has the following properties: Waste gas composition: Mole fraction(=
Free Heat transfer Heat Heat transfer coefficient
Thermite Background: Thermite is a powder made from aluminum powder and a metal oxide [usually iron oxide (Fe2O3‚ known as rust)]. The thermite reaction is a redox reaction‚ where Aluminum reduces the oxide of another metal. For example‚ when using iron oxide (as I did) the equation would be Fe2O3(s) + 2 Al(s) -> Al2O3(s) + 2 Fe(l). Black or blue iron oxide (Fe3O4) could also be used. Other examples of possible oxides are manganese thermite (MnO2)‚ Cr2O3‚ and copper thermite (CuO). Aluminum can
Premium Heat Fundamental physics concepts Electric charge
Introduction Recrystallization is a method used to purify solid organic compounds. Using the recrystallization technique‚ a solid compound is dissolved in a solvent and the compound slowly crystallizes as the solution cools. Using a filtration technique‚ a pure solid is produced when the molecules of the impure particles in the compound are excluded from the crystal lattice. After obtaining the pure compound‚ a melting point determination procedure can be done using a mel-temp device to correctly
Premium Solubility Solid Chemistry
(Important = do not look directly into the beaker; observe the reaction from the side.) 3. Record the measure of the temperature every 30 seconds for at least 15 minutes; until the reaction stops. Do not stir the solution. Part D: 1. Repeat Part C‚ yet this time stir the solution continuously. Part E: 1. Create a graph for the temperature and time in Part C and Part D. Observations/Data Part A: #1 = The copper chloride crystals are turquoise and extremely fine. They
Premium Aluminium Scientific method Observation
The kinetic equation‚ half-life values‚ correlation coefficient and pre-harvest interval (PHI) of the trifloxystrobin and tebuconazole residue dissipation were calculated from the experimental data and summarized in Table 4. The dissipation dynamics of trifloxystrobin on green tea leaves followed a first-order rate equation as follows C = 2.5472e-0.245x (r=0.9797) and C = 6.5457e-0.207x (r= 0.9804) with the half-life of 2.83 and 3.34 days for trifloxystrobin at RD and DRD‚ respectively. The half-life
Premium Water Chemistry Solvent
ODD ONE OUT 1. Find the odd one out. A. Ginger B. Garlic C. Chilli D. Potato ANS-C Explanation Chilli is modified stems 2. Find the odd one out A. Eagle B. Hawk C. Bird D. None of these ANS-C Bird is prey of another bird 3. Find the odd one out A. Credit B. Deposit C. Withdrawl D. None of these ANS-C Explanation Credit and deposit indicates addition in amount while withdrawl indicates reduction. 4. Find the odd one out A. Microscope B. Telescope C. Periscope D. Stethoscope ANS-D Explanation The stethoscope
Premium Potato Concentration Starch