CHEMISTRY-MOD.MASTERING (18W)
8th Edition
ISBN: 9780136780922
Author: Robinson
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 11, Problem 11.9P
- Why was a new solvent needed for extracting caffeine from coffee beans?
- Why is the solubility of caffeine high in supercritical CO2?
- Why is carbon dioxide the most widely used supercritical fluid?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
what is the effect of temperature in the solubility of solid organic solutes?
Locke-Ringer's solution contains 9 g of sodium chloride, 0.24 g of calcium chloride, 0.42 g of potassium chloride, 0.5 g of sodium bicarbonate, 0.2 g of magnesium chloride, and 0.5 g of dextrose in 1,000 cc of distilled water. Calculate the concentration of sodium bicarbonate in the solution. Calculate the concentration of the dextrose in the solution.
The literature value of solubility of a substance "A" is 2.5 g/100mL. The value for a
different substance "B" is 0.1*10-3 g/100mL. In the lab, you determine the
solubilities of this two substances experimentally. Your results are 2.6 g/100mL for
substance A and 0.2*10-2 g/100mL for substance B.
What deviation between experimental result and literature value is larger by
percentage? What result would you call closer to the literature value? Why?
Chapter 11 Solutions
CHEMISTRY-MOD.MASTERING (18W)
Ch. 11 - Prob. 11.1PCh. 11 - The normal boiling point of water is 100.0 C, and...Ch. 11 - PRACTICE 11.1 The boiling point of ethanol is 78.4...Ch. 11 - APPLY 11.2 Chloroform CHCl3 has Hvap=29.2kJ/mol...Ch. 11 - How much heat is required to convert15.0 g of...Ch. 11 - APPLY 11.4 What is the sign and magnitude of q...Ch. 11 - Look at the phase diagram of H2O in Figure 11.7,...Ch. 11 - Prob. 11.8ACh. 11 - Why was a new solvent needed for extracting...Ch. 11 - A fire extinguisher containing carbon dioxide has...
Ch. 11 - Look at the phase diagram of CO2 in Figure11.13,...Ch. 11 - Liquid carbon dioxide is also used as non-toxic...Ch. 11 - For the phase transition CO2(s)CO2(g), predict the...Ch. 11 - A sample of supercritical carbon dioxide was...Ch. 11 - Assume that you have a liquid in a cylinder...Ch. 11 - The phase diagram of a substance is shown below....Ch. 11 - Prob. 11.17CPCh. 11 - Prob. 11.18CPCh. 11 - The following compound undergoes a phase...Ch. 11 - A magnetized needle gently placed on the surface...Ch. 11 - Water flows quickly through the narrow neck of a...Ch. 11 - Predict which substance in each pair has the...Ch. 11 - Prob. 11.23SPCh. 11 - The chemical structure for oleic acid, the primary...Ch. 11 - Prob. 11.25SPCh. 11 - Prob. 11.26SPCh. 11 - The vapor pressure of SiCI4 is 100 mm Hg at 5.4 C,...Ch. 11 - What is the vapor pressure of CS2 in mm Hg at 20.0...Ch. 11 - What is the vapor pressure of SiCI4 in mm Hg at...Ch. 11 - Dichloromethane, CH2CI2, is an organic solvent...Ch. 11 - Prob. 11.31SPCh. 11 - Use the plot you made in Problem 11.30 to find a...Ch. 11 - Prob. 11.33SPCh. 11 - Prob. 11.34SPCh. 11 - Prob. 11.35SPCh. 11 - Prob. 11.36SPCh. 11 - Acetone,acommon laboratorysolvent,has...Ch. 11 - Why is Hvap usually larger than Hfusion ?Ch. 11 - Why is the heat of sublimation, Hsubl, equal to...Ch. 11 - Naphthalene, better known as "mothballs," has bp =...Ch. 11 - Prob. 11.41SPCh. 11 - Prob. 11.42SPCh. 11 - Prob. 11.43SPCh. 11 - Prob. 11.44SPCh. 11 - Prob. 11.45SPCh. 11 - How much energy in kilojoules is needed to heat...Ch. 11 - Prob. 11.47SPCh. 11 - How much energy in kilojoules is released when...Ch. 11 - How much energy in kilojoules is released when...Ch. 11 - Prob. 11.50SPCh. 11 - Prob. 11.51SPCh. 11 - Prob. 11.52SPCh. 11 - Prob. 11.53SPCh. 11 - Prob. 11.54SPCh. 11 - Look at the phase diagram of H2O in Figure 11.7,...Ch. 11 - Prob. 11.56SPCh. 11 - Oxygen has Tt=54.3K,Pt=1.14mmHg,Tc=154.6K, and...Ch. 11 - Prob. 11.58SPCh. 11 - Prob. 11.59SPCh. 11 - Prob. 11.60SPCh. 11 - Prob. 11.61SPCh. 11 - Benzene has a melting point of 5.53 C and a...Ch. 11 - Prob. 11.63SPCh. 11 - How many phase transitions did you pass through in...Ch. 11 - Prob. 11.65SPCh. 11 - Prob. 11.66SPCh. 11 - Prob. 11.67SPCh. 11 - Prob. 11.68SPCh. 11 - Prob. 11.69SPCh. 11 - Prob. 11.70SPCh. 11 - Prob. 11.71SPCh. 11 - Prob. 11.72SPCh. 11 - Prob. 11.73SPCh. 11 - For each of the following substances, identify the...Ch. 11 - The chlorofluorocarbon refrigerant...Ch. 11 - Prob. 11.76MPCh. 11 - Prob. 11.77MP
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- Fluoridation of city water supplies has been practiced in the United States for several decades. It is done by continuously adding sodium fluoride to water as it comes from a reservoir. Assume you live in a medium-sized city of 150,000 people and that 660 L (170 gal) of water is used per person per day. What mass of sodium fluoride (in kilograms) must be added to the water supply each year (365 days) to have the required fluoride concentration of 1 ppm (part per million)that is, 1 kilogram of fluoride per 1 million kilograms of water? (Sodium fluoride is 45.0% fluoride, and water has a density of 1.00 g/cm3.)arrow_forward2. What is the freezing point of a solution prepared by adding 150. g trichothecin (C19H24O5) to 0.867 kg ofbenzene? The freezing point of pure benzene is 5.5 °C. The freezing point constant for benzene is 5.12 °C/m.arrow_forwardTristearin and stearic acid are insoluble in water. However, sodium stearate (soap) is soluble. Why is there this difference is solubility?arrow_forward
- Using the values for the solubilities of boric acid, salicylic acid and disodium citrate, calculate the amount of saturated solution in water and the amount of water that would be required to make 300 mL of a 1.1 mg/mL solution for each of the three materials. Values are: Boric acid = 5.7 g per 100 mL salicylic acid = 2.48 g per 100 mL disodium citrate = 42.5 g per 100 mLarrow_forwardWhy do proteins form precipitates under some conditions and gels under others?arrow_forwardWhy do Sedimentation and filtration is important in water treatment? Is a period of time important in water purification?arrow_forward
- 1-What volume of 0.57 M NaCl solution contains 169.5 grams of NaCl? 2-Calculate the molality of a solution containing 175g of glucose (C6H12O6) in 1828 g of ethanol. 3- What volume of 0.87 N CaCO3 solution contains 183.9 grams of CaCO3? 7- How many Faraday is needed to deposit 5 moles of Gold (Au) from AuCl3 solution using electrolysis process. 8- Determine the oxidation number of the Chromium (Cr) in an unknown salt if electrolysis of a molten sample of this salt for 3 hours with a 15 amp current deposits 43.65 grams of Chromium metal at the cathode. 4-Oxidation number of C in H2CO3 isarrow_forwardB-Galactosidase (ß-gal) is a hydrolase enzyme that catalyzes the hydrolysis of ß-galactosides into monosaccharides. A 0,421 g sample of ß-galactosidase is dissolved in water to make 0.133 L of solution, and the osmotic pressure of the solution at 25 'C' is found to be 0.674 mbar. Calculate the molecular mass of ß-galactosidase. molecular mass: TOOLS *10* g/mol C Carrow_forwardExplain the processes of dissolution of Naclarrow_forward
- 5.20 g of tea leaves were used for the extraction of caffeine in a laboratory experiment, If the mass of crude caffeine obtained and the mass of pure caffeine recovered after recrystallization are 0.166 g and 0.082 g respectively, what is the percentage yield of pure caffeine from the tea leaves? O 2.10% O 2.30% O 1.58% O 3.62%arrow_forwardChoosearrow_forwardThe molar mass of an enzyme was measured by dissolving the 3.221 grams of the enzyme in 1.00 liter of water. The osmotic pressure of the solution was 5.746 cm of solution at 20°C (assume the density of the solution is 1.00 g/mL and the density of mercury is 13.56 g/mL). What is the molar mass of the enzyme?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage Learning
Chemistry: The Molecular Science
Chemistry
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:Cengage Learning
Chemistry & Chemical Reactivity
Chemistry
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:Cengage Learning
Thermogravimetric Analysis [ TGA ] # Thermal Analysis # Analytical Chemistry Part-11# CSIR NET/GATE; Author: Priyanka Jain;https://www.youtube.com/watch?v=p1K-Jpzylso;License: Standard YouTube License, CC-BY