Macroscale and Microscale Organic Experiments
7th Edition
ISBN: 9781305577190
Author: Kenneth L. Williamson, Katherine M. Masters
Publisher: Brooks Cole
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Chapter 6, Problem 6Q
A mixture of toluene
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A hydrate of chromium(II) sulfate (CrSO4·XH2O) decomposes to produce 19.6% water & 80.4% AC. Calculate the water of crystallization for this hydrated compound. (The molar mass of anhydrous CrSO4 is 148.1 g/mol.)
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Chapter 6 Solutions
Macroscale and Microscale Organic Experiments
Ch. 6 - Assign the peaks in the 1H NMR spectrum of eugenol...Ch. 6 - A mixture of ethyl iodide (C2H5I,bp72.3C) and...Ch. 6 - Prob. 3QCh. 6 - Prob. 4QCh. 6 - Prob. 5QCh. 6 - A mixture of toluene (bp110.8C) and water is steam...Ch. 6 - Did sublimation aid in the purification of the...Ch. 6 - Prob. 8QCh. 6 - Prob. 9QCh. 6 - Prob. 10Q
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- Suppose you are presented with a clear solution of sodium thiosulfate, Na2S2O3. How could you determine whether the solution is unsaturated, saturated, or supersaturated?arrow_forwardConsider this information regarding two compounds. Thallium azide: yellow crystalline solid; melting point = 330 C; slightly soluble in water, more soluble in hot water; insoluble in ethanol or diethyl ether. Camphene: colorless, cubic crystals; melting point = 51 C; boiling point = 159 C; insoluble in water; moderately soluble in ethanol; soluble in diethyl ether. (a) Is camphene an ionic or molecular compound? Explain your answer. (b) Is thallium azide an ionic or molecular compound? Explain your answer.arrow_forwardSteam distillation was performed to obtain geraniol (MM = 154.25 g/mol) from dried rose petals. At 99.25℃, the vapor pressure of water is 714 mmHg while that of geraniol was determined to be 46 mmHg. Determine the theoretical mass of geraniol that will distill per 100 g of water. If 150 g of dried rose petals were used, calculate the percent yield of the distillation.arrow_forward
- The solubility of acetanilide in hot water (5.5 g/100 ml at 100 o C) is not very great, and its solubility in cold water (0.53 g/ 100 ml at 0 o C) is significant. What would be the maximum theoretical percent recovery from the crystallization of 5.0 g of acetanilide from 100 ml water. (assuming the solution is chilled at 0 o C).arrow_forwardState a reason of the following statement: (i) Soap do not work in hard water. (ii) The use of the sweetener aspartame is limited to cold foods and drinks.arrow_forwardA student neglected to add sodium carbonate when extracting the tea leaves with hot water. Yet a very high yield of caffeine was obtained. The crystals melted at 202-214°C. Explain.arrow_forward
- Heating a solid until it passes directly from the solid phase into the gaseous phase. Separating a liquid from an insoluble solid sediment by carefully pouring the liquid from the solid without disturbing the solid. The process of vapor returning to the solid phase without a liquid phase in between. Heating a mixture to vaporize a volatile liquid component to make the remaining component dry. Separating a solid from a liquid using a porous material, such as paper, charcoal, or sand, as a filter. Using a solvent to selectively dissolve one or more components from a solid mixture. Answer Bank extraction filtration decantation deposition sublimation evaporationarrow_forwardEthylene glycol, CH2OHCH2OH is a liquid at room temperature and dissolves into water in all proportions. However, butane, C4H10, is a gas at room temperature and is insoluble in water. How do you account for these differences?arrow_forwardA small storage cabinet 2m x 2m x 3m contains an open 208 L drum of aqueous TEC at a concentration of 120 mg/L. The cabinet has been closed for over 2 months, so equilibrium conditions have been established. What is the TCE concentration in the water and vapor phases at this time? Assume that the temperature is 25 oC, R = 8.2 x 10-5 m3•atm/mole/K, and H = 0.0091 m3•atm/molearrow_forward
- 1. Steam distillation was performed to obtain geraniol (MM = 154.25 g/mol) from dried rose petals. At 99.25°C, the vapor pressure of water is 714 mmHg while that of geraniol was determined to be 46 mmHg. a. Determine the theoretical mass of geraniol that will distill per 100 g of water. b. If 150 g of dried rose petals were used, calculate the percent yield of the distillation.arrow_forwardYou synthesized a sample of tetramethylammonium triiodide and managed to measure the melting point. However, the melting point deviates from the ideal melting point for tetramethyl-ammonium tri-iodide, which is 117 degrees C. This suggests that your sample may be impure. Unfortunately, you ran out of time and were unable to carry out the gravimetry. Your demonstrators agreed to help you out, but instead of using gravimetry, they carried out the elemental analysis of your product. The sample contains C - 9.27 %, H -2.33 %, and N - 2.70 %. How many iodine atoms does your sample have according to this analysis?arrow_forwardExplain and sketch the Born-Mayer equation to determine the crystallization energy of NaCl and MgCl2arrow_forward
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Solutions: Crash Course Chemistry #27; Author: Crash Course;https://www.youtube.com/watch?v=9h2f1Bjr0p4;License: Standard YouTube License, CC-BY