A sample of fried potatoes weighing 200 g was extracted using a volatile organic solvent. The recovered cooking oil weighed 15 g. What methods from this experiment could be used to separate the cooking oil after the extraction? What was the percent of the oil in the potatoes? Show your calculations
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- A sample of fried potatoes weighing 200 g was extracted using a volatile organic solvent. The recovered cooking oil weighed 15 g. What methods from this experiment could be used to separate the cooking oil after the extraction? What was the percent of the oil in the potatoes? Show your calculations.
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- Milk samples Dairy inspectors visit farms unannouncedand take samples of the milk to test for contamination. If the milk is found to contain dirt, antibiotics, or otherforeign matter, the milk will be destroyed and the farmreinspected until purity is restored. Would simple random sampling be appropriate for select-ing farms for inspection? If so, explain how it would be done. If not, explain why it is not appropriate.The main type of separation techniques are thickening (water removed from product),Evaporation (separation of two liquids), Filtration (separation of solid particles from liquid) what characterizes them and what is the main difference between them and effect they have on food?Can sand be separated from a mixture by filtration? Can heptane be separated from the salt mixture with a separatory funnel? Can salt be separated from the brine by evaporation? However, can your answer be well developed? because I did a lab separating Sand, Salt, Heptane and Water!
- A sample of fried potatoes weighing 200 g was extracted using a volatile organic solvent. The recovered cooking oil weighed 15 g. What methods from this experiment could be used to separate the cooking oil after the extraction? What was the percent oil in the potatoes? Show your calculations. How is gravity filtration different from vacuum filtration? Give examples of mixtures that can be separated by gravity filtration.Pure aspirin has a melting point of 135-136 °C. Before the melting point was determined - if the sample contains water by absorbing moisture in the air - what effect could this have on the observed melting point from the sample?If Jotaro Kujo measured the amount of current that passes through a sample to measure the amount of analyte in the sample, what kind of method did he use? c.Volumetric method b.Electroanalytical method c.Gravimetric method d.Spectroscopic method
- When purifying a sample of aspirin that was produced in the lab, the impure aspirin sample should be dissolved in a very cold solvent, so that solid impurities can be filtered and analyzed the next day or the next week. True or False?A 1 mL microbial suspension comparable to 1 mL of 1.0 McFarland standard was subjected to a series of dilutions. An aliquot of 0.2 mL was transferred into a 100-mL volumetric flask and diluted with sterile saline solution to its final volume. Then a 0.1 mL of the resulting solution was transferred into a 50-mL volumetric flask diluted to its final volume. What would be the final concentration?1. The formula for lactose is C12H22O11, and the monohydrate is C12H22O11*H2O. What is the percent by weight of lactose in lactose monohydrate? Give your answer to four significant digits as a percentage (xx.xx) - do not include "%" 2. If the image in the polarimeter appears as shown above, which button should you press? The "up" or R blue button The red button The green button No button, you have found the correct optical rotation. The "down" or L blue button 3. Suppose you measure 7.000 g of a substance and dissolve it in 100.0 mL of water, and place the sample in a 2.000 dm path-length sample tube, and then observe a rotation of 19.5 degrees with the sodium-D lamp. What is the specific rotation? Give your answer to three digits, without units (xxx)
- Normality of a solution was determined by five different titrations. The results were 9.5 mL, 8.5 mL, 9.1 mL, 9.3 mL, and 9.1 mL. Calculate the mean, median and standard deviation of this dataIn the determination of the concentration of chloride ion in water five experiments were done: 254.3 ppm, 254.7 ppm, 249.9 ppm, 252.5 ppm, and 253.4 ppm. What is the relative average deviation of this experiment? (ppm=mg/LWhich of the statements below are TRUE regarding the mean and standard deviation? I. As the number of measurements increases, x̄ approaches μ if there is no random error.II. The square of the standard deviation is the average deviation.III. The mean is the center of the Gaussian distribution.IV. The standard deviation measures the width of the Gaussian distribution.