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0.5g of Olive Oil and Polypropylene Glycol (unknown amount mixed) were mixed together. This was poured through a pre-soaked silica gel open column chromatography tube, that was soaked with 5mL of dichloromethane. The contents of the mix were then poured into the column, followed bya rinsing of the mixture container with 2mL of dichloromethane. The sample was eluted with 10mL of dichloromethane. Contents were captured in a vial with two boiling stones. We switched our vial with a new one + two boiling stones, and eluted 10mL of methanol into the column. Both vials were heated and IR spectra ran. Dichloromethane showed residue of the Olive Oil and Methanol showed reside of the Polypropyplene Glycol. Question: How do I find the weight percent of each component in the original mixture and would this affect the outcome if Methanol had been used in place of the dichloromethane? Product weight of Oil: 0.11g & Product weight of Polypropylene Glycol : 0.19g.
Sodium carbonate was used to precipitate silver from a solution. 6.00 grams of silver carbonate were recovered from 1.500L of solution.
Verify the following statements (a) One part per million corresponds to one minute in two years, or a single penny in $10,000.
Calculate the pH of the resultant mixtures: a. 10 ml of 0.2 M Ca(OH)2 + 25 ml of 0.1 M HCL b. 10 ml of 0.01 M H2SO4 + 10 ml of 0.01 M Ca(OH)2 c. 10 ml of 0.1 M H2SO4 + 10 ml of 0.1 M KOH
Determine What would be the density of the solid if density of toluene at the temperature of the experiment = 0.864 g/mL.?
How much heat does your body lose when 1.5 g of sweat evaporates from your skin at 25 C? (Assume that the sweat is only water.) The heat of vaporization of water at 25 C is 44.0 kJ/mole.
Determine How much Na2EDTA x 2 H2O must be weighed to form exactly two litres of 0.0500 M solution? FW=372.24
a solution made by adding .106 mol of CH3COOH to 1.0 kg of water is found to freeze at -.203 C. Calculate the percent of the acid that has undergone ionization. The molal freezing point constant of water is 1.86
CaH2(s) + 2H2O(l) Ca(OH)2(aq) + 2H2(g) How many grams of CaH2 (Molar Mass = 42.1 g/mol)are needed to generate 10.0 L of H2 gas if the pressure of H2 is 769 torr at 28.0°C?
What mass of CCl4 will be formed if 1.20 moles of methane react with 1.55 moles of chlorine?
Lipids (fats) are esters of long chain fatty acids and glycerol. Similarly, describe the general structures of proteins and carbohydrates.
Calculate the specific heat capacity of a sample liquid if this 100 g sample of an unknown liquid absorbs 2000 J of heat energy, raising the liquid's temperature from 50 degree Celsius to 70 degree Celsius?
Determine the mass percent of CH3COOH in this solution if density of vinegar is 1.01 g/mL? Also calculate mole fraction of acetic acid in this solution and molality of this solution?
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