Leaching of Oil from Soybeans in a Single Stage. Repeat Example 12.9-1 for single-stage leaching of oil from soybeans. The 100 kg of soybeans contains 22 wt % oil and the solvent feed is 80 kg of solvent containing 3 wt % soybean oil. =1.5 Ans. L, = 52.0 kg, ya1 = 0.239, V, = 50.0 kg, x41 = 0.239, N, |3| %3D
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- PV = nRT. The pressure is 0.9912atm. V = 50.5 mL. T = 21.5°C and n = 0.00200mol. Calculate R from this data in Latm/molK.The researcher extracts a sample of well water and prepares it for TXRF analysis with a 10.00 mg/L V internal standard, like the calibration standards. The result produces SCa = 69297.81 and SV = 13481.2.Determine the concentration of Ca.An aquifer contaminated with petroleum is found to have the following component concentrations at a particular site: benzene 158 ppm toluene 124 ppm ethylbenzene 91 ppm xylene 45 ppm n-heptadecane 161 ppm pristane 84 ppm Provide an estimate for the age of the spill at this site using (a) BTEX ratio and (b) nC17:Pr ratio. Show your calculations and use units throughout. Give proper s.f. for the answer.
- Various parameters in a gas absorption experiment are as follows; Water flow rate =5 L/min, Air flow rate=25 L/min, CO2 flow rate=6 L/min. Then, to find the amount of CO2 absorbed into the water 1 hour after the system is started and stabilized, 50 mL samples are taken from the inlet and outlet of the tank and titrated with 0.01M NaOH. 100mL samples are taken from the tower entrance and exit and sent to the hemp apparatus. The consumptions measured with the help of the Hemp apparatus are 2.1 mL (inlet) and 1.9 mL (output), respectively. According to this, find the amount of CO2 absorbed by titration? (Note: The relative error in the experiment is 10.)An active air sampler was used to trap polyaromatic hydrocarbons (PAHs) in the air above the sea area with massive oil spill. Air was pumped through an activated charcoal adsorbent material at a flow rate of 10 L per min for 12 hrs. The PAHs were then eluted out of the adsorbent material using 10 mL hexane. The eluate was analyzed by GC-MS. Anthracene was one of the PAHs detected and was found to be present at a concentration of 81.1 µg/mL. Determine the concentration of anthracene in the air above the oil spill. Report your answer in mg/m³.4. A new method for the determination of mercury in fish was tested against a N.I.S.T. standard to determine if there was any bias (determinate error) in the new technique. The N.I.S.T. standard fish sample was certified to contain 13.55 ppm Hg. The results of six analyses by the new method gave a mean value of 14.15 ppm and s.d. = 0.42 ppm. Does the new method give accurate results at the 95% confidence level?
- A sample of enzyme involved in alcohol metabolism, extracted and purified extensively from yeast cultures, was loaded onto a gel filtration column for molecular weight approximation. A set of protein standards with known molecular weight was eluted separately through the same column and suitable buffer following the elution of blue dextran for void volume determination. The following table summarizes the data obtained from the experiment: Elution flow rate 1 mL/min Sample collector setting Continuous; Sequential Container change rate 1 tube/min Sample/Standard eluted Test tube No/s. MW (Da) Blue dextran 4 2,000,000 Bovine thyroglobulin 11 669,000 Horse spleen apoferritin 14 443,000 Beta-amylase from sweet potato 21 200,000 Bovine serum albumin 27 66,000 Alcohol metabolism enzyme 19 ? 1. Process the given raw data in a tabular format of properly identified data points ready for calibration curve plotting. 2. Construct the calibration curve using MS Excel for use in MW determination.…100 g of soil is leached with a strong solution of Calcium chloride such that all the exchange sites are occupied by Ca2+. The soil is subsequently leached again with a strong solution of magnesium chloride. It is determined that the resulting 100 mL leachate contains 5000 mg of Ca2+. What is the soil CEC (cmolc/kg)? The atomic wt. of Ca is 40 g/mol.please answer in word don't image upload thank you.A 0.0200 gram blood sample was decomposed by a microwave digestion technique followed by dilution to 100.0 mL in a volumetric flask. Aliquots of the sample solution were treated with a lead complexing reagent and water as follows: Solution 1: 10.0 ml blood sample + 20.0 mL complexing agent + 30.0 mL H20. Solution 2: 10.0 ml blood sample + 20.0 mL complexing agent + 26.0 mL H20 + 4.00 mL of 78 ppb Pb2+ standard. The resulting solutions were analyzed by UV/Vis at 375 nm. Absorbance for solution 1 = 0.155 and for solution 2 = 0.216. Calculate the concentration of lead (ppb) in the original sample.
- A feed mixture containing 50 wt% n-heptane and 50 wt% methyl cyclohexane (MCH) is to be separated by liquid-liquid extraction into one product containing 92.5 wt% methylcyclohexane and another containing 7.5 wt% methylcyclo- hexane. Aniline will be used as the solvent. (a) What is the minimum number of theoretical stages necessary to effect this separation? (b) What is the minimum extract reflux ratio? (c) If the reflux ratio is 7.0, how many theoretical contacts will be required? Liquid-liquid equilibrium data for the system n-heptane-methyl cyclohexane-aniline at 25°C and at 1 atm (101 kPa) Hydrocarbon Layer Solvent Layer Weight percent MCH, solvent- free basis Pounds aniline/ pound solvent- free mixture Pounds aniline/ Weight percent MCH, solvent- free basis pound solvent- free mixture 0.0 0.0799 0.0 9.9 20.2 23.9 0.0836 0.087 0.0894 15.12 13.72 11.5 11.8 33.8 37.0 50.6 60.0 11.34 36.9 0.094 9.98 9.0 8.09 44.5 0.0952 0.0989 0.1062 50.5 67.3 66.0 76.7 84.3 88.8 6.83 74.6 79.7 82.1…A potassium hydrogen phthalate solution was prepared by adding 0.0996 g of dry potassium hydrogen phthalate (MW = 204.22) in 100 mL distilled water. 1 mL of the prepared potassium hydrogen phthalate solution was transferred using pipette into 500-10000 mg/L COD tube before digested in the thermo-reactor at 148 oC for two hours. Calculate the measured COD reading in mg 02/L from the spectrophotometer at 600 nm if given oxygen molecular weight is 32 and the chemical equation for the oxidation reaction between potassium hydrogen phthalate (C8H5KO4) and chromic acid in the COD reagent tube is as follows: C8H5KO4 + 15/202 + H+ →→ 8C02 +K+ + 3H2O. (Note: MW is molecular weight)Chemistry The amount of V was found to be 0.19% (+/-) 0.02% V (N=6). Calculate t-calc, assuming 95% confidence level.