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OWLv2 for Ebbing/Gammon's General Chemistry, 11th Edition, [Instant Access], 1 term (6 months)
11th Edition
ISBN: 9781305673939
Author: Darrell Ebbing; Steven D. Gammon
Publisher: Cengage Learning US
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Chapter 12, Problem 12.7QP
Give one example of each: a salt whose heat of solution is exothermic and a salt whose heat of solution is endothermic.
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Chapter 12 Solutions
OWLv2 for Ebbing/Gammon's General Chemistry, 11th Edition, [Instant Access], 1 term (6 months)
Ch. 12.1 - Prob. 12.1ECh. 12.1 - Identify the solute(s) and solvent(s) in the...Ch. 12.2 - Prob. 12.2CCCh. 12.2 - Which of the following compounds is likely to be...Ch. 12.2 - Which ion has the larger hydration energy, Na+ or...Ch. 12.2 - Prob. 12.3CCCh. 12.3 - A liter of water at 25C dissolves 0.0404 g O2 when...Ch. 12.3 - Most fish have a very difficult time surviving at...Ch. 12.4 - An experiment calls for 35.0 g of hydrochloric...Ch. 12.4 - Toluene, C6H5CH3, is a liquid compound similar to...
Ch. 12.4 - Prob. 12.7ECh. 12.4 - A solution is 0.120 m methanol dissolved in...Ch. 12.4 - A solution is 0.250 mole fraction methanol, CH3OH,...Ch. 12.4 - Urea, (NH2)2CO, is used as a fertilizer (sec the...Ch. 12.4 - Prob. 12.11ECh. 12.5 - Naphthalene, C10H8, is used to make mothballs....Ch. 12.5 - Prob. 12.5CCCh. 12.6 - How many grams of ethylene glycol, CH2OHCH2OH,...Ch. 12.6 - A 0.930-g sample of ascorbic acid (vitamin C) was...Ch. 12.6 - A 0.205-g sample of white phosphorus was dissolved...Ch. 12.7 - Calculate the osmotic pressure at 20C of an...Ch. 12.7 - Prob. 12.6CCCh. 12.8 - Prob. 12.17ECh. 12.8 - Each of the following substances is dissolved in a...Ch. 12.9 - Prob. 12.18ECh. 12.9 - If electrodes that are connected to a direct...Ch. 12 - Prob. 12.1QPCh. 12 - Prob. 12.2QPCh. 12 - Explain in terms of intermolecular attractions why...Ch. 12 - Prob. 12.4QPCh. 12 - Using the concept of hydration, describe the...Ch. 12 - What is the usual solubility behavior of an ionic...Ch. 12 - Give one example of each: a salt whose heat of...Ch. 12 - What do you expect to happen to a concentration of...Ch. 12 - Prob. 12.9QPCh. 12 - Pressure has an effect on the solubility of oxygen...Ch. 12 - Prob. 12.11QPCh. 12 - When two beakers containing different...Ch. 12 - Prob. 12.13QPCh. 12 - Prob. 12.14QPCh. 12 - Prob. 12.15QPCh. 12 - Prob. 12.16QPCh. 12 - One can often see sunbeams passing through the...Ch. 12 - Prob. 12.18QPCh. 12 - Explain on the basis that like dissolves like why...Ch. 12 - Prob. 12.20QPCh. 12 - Calculate the number of moles of barium chloride...Ch. 12 - Prob. 12.22QPCh. 12 - If 291g of a compound is added to 1.02 kg of water...Ch. 12 - A 5.1-g sample of CaCl2 is dissolved in a beaker...Ch. 12 - Consider two hypothetical pure substances, AB(s)...Ch. 12 - Equal numbers of moles of two soluble, substances,...Ch. 12 - Even though the oxygen demands of trout and bass...Ch. 12 - You want to purchase a salt to melt snow and ice...Ch. 12 - Prob. 12.29QPCh. 12 - Prob. 12.30QPCh. 12 - Prob. 12.31QPCh. 12 - Consider the following dilute NaCl(aq) solutions....Ch. 12 - Prob. 12.33QPCh. 12 - Prob. 12.34QPCh. 12 - If l-mol samples of urea, a nonelectrolyte, sodium...Ch. 12 - Prob. 12.36QPCh. 12 - Prob. 12.37QPCh. 12 - Prob. 12.38QPCh. 12 - Prob. 12.39QPCh. 12 - Prob. 12.40QPCh. 12 - Arrange the following substances in order of...Ch. 12 - Indicate which of the following is more soluble in...Ch. 12 - Prob. 12.43QPCh. 12 - Which of the following ions would be expected to...Ch. 12 - Arrange the following alkaline-earth-metal iodates...Ch. 12 - Explain the trends in solubility (grams per 100 mL...Ch. 12 - The solubility of carbon dioxide in water is 0.161...Ch. 12 - Prob. 12.48QPCh. 12 - Prob. 12.49QPCh. 12 - Prob. 12.50QPCh. 12 - Prob. 12.51QPCh. 12 - Prob. 12.52QPCh. 12 - Vanillin, C2H2O3, occurs naturally in vanilla...Ch. 12 - Lauryl alcohol, C12H25OH, is prepared from coconut...Ch. 12 - Fructose, C6H12O6, is a sugar occurring in honey...Ch. 12 - Caffeine. C8H10N4O2, is a stimulant found in tea...Ch. 12 - A 100.0-g sample of a brand of rubbing alcohol...Ch. 12 - An automobile antifreeze solution contains 2.50 kg...Ch. 12 - Prob. 12.59QPCh. 12 - Prob. 12.60QPCh. 12 - Concentrated hydrochloric acid contains 1.00 mol...Ch. 12 - Concentrated aqueous ammonia contains 1.00 mol NH3...Ch. 12 - Prob. 12.63QPCh. 12 - Prob. 12.64QPCh. 12 - A solution of vinegar is 0.763 M acetic arid,...Ch. 12 - A beverage contains tartaric acid, H2C4H4O6, a...Ch. 12 - Calculate the vapor pressure at 35C of a solution...Ch. 12 - What is the vapor pressure at 23C of a solution of...Ch. 12 - What is the boiling point of a solution of 0.133 g...Ch. 12 - A solution was prepared by dissolving 0.800 g of...Ch. 12 - An aqueous solution of a molecular compound...Ch. 12 - Urea, (NH2)2CO, is dissolved in 250.0 g of water....Ch. 12 - Prob. 12.73QPCh. 12 - Prob. 12.74QPCh. 12 - Safrole is contained in oil of sassafras and was...Ch. 12 - Butylated hydroxytoluene (BHT) is used as an...Ch. 12 - Prob. 12.77QPCh. 12 - Prob. 12.78QPCh. 12 - What is the freezing point of 0.0075 m aqueous...Ch. 12 - What is the freezing point of 0.0088 m aqueous...Ch. 12 - Prob. 12.81QPCh. 12 - In a mountainous location, the boiling point of...Ch. 12 - Prob. 12.83QPCh. 12 - Prob. 12.84QPCh. 12 - Prob. 12.85QPCh. 12 - Prob. 12.86QPCh. 12 - A gaseous mixture consists of 87.0 mole percent N2...Ch. 12 - A natural gas mixture consists of 88.0 mole...Ch. 12 - Prob. 12.89QPCh. 12 - Prob. 12.90QPCh. 12 - A 55-g sample of a gaseous fuel mixture contains...Ch. 12 - Prob. 12.92QPCh. 12 - A liquid solution consists of 0.30 mole fraction...Ch. 12 - What is the total vapor pressure at 20C of a...Ch. 12 - A sample of potassium aluminum sulfate 12-hydrate....Ch. 12 - A sample of aluminum sulfate 18-hydrate,...Ch. 12 - Urea, (NH2)2CO, has been used to melt ice from...Ch. 12 - Calcium chloride, CaCl2, has been used to melt ice...Ch. 12 - Prob. 12.99QPCh. 12 - Prob. 12.100QPCh. 12 - Which aqueous solution has the lower freezing...Ch. 12 - Which aqueous solution has the lower boiling...Ch. 12 - Commercially, sulfuric acid is usually obtained as...Ch. 12 - Prob. 12.104QPCh. 12 - A compound of manganese, carbon, and oxygen...Ch. 12 - A compound of cobalt, carbon, and oxygen contains...Ch. 12 - The carbohydrate digitoxose contains 48.64% carbon...Ch. 12 - Analysis of a compound gave 39.50% C, 2.21% H, and...Ch. 12 - Fish blood has an osmotic pressure equal to that...Ch. 12 - Prob. 12.110QPCh. 12 - Prob. 12.111QPCh. 12 - Prob. 12.112QPCh. 12 - How are phospholipids similar in structure to a...Ch. 12 - Prob. 12.114QPCh. 12 - Two samples of sodium chloride solutions are...Ch. 12 - Prob. 12.116QPCh. 12 - You have an aqueous, dilute solution of a...Ch. 12 - Prob. 12.118QPCh. 12 - Prob. 12.119QPCh. 12 - Prob. 12.120QPCh. 12 - When 79.3 g of a particular compound is dissolved...Ch. 12 - What is the boiling point of a solution made by...Ch. 12 - Prob. 12.123QPCh. 12 - Prob. 12.124QPCh. 12 - Prob. 12.125QPCh. 12 - Prob. 12.126QPCh. 12 - Prob. 12.127QPCh. 12 - Prob. 12.128QPCh. 12 - An aqueous solution is 0.797 M magnesium chloride....Ch. 12 - A CaCl2 solution at 25C has an osmotic pressure of...Ch. 12 - Prob. 12.131QPCh. 12 - Prob. 12.132QPCh. 12 - The lattice enthalpy of sodium chloride, H for...Ch. 12 - Prob. 12.134QPCh. 12 - Prob. 12.135QPCh. 12 - Prob. 12.136QPCh. 12 - Prob. 12.137QPCh. 12 - An aqueous solution is 20.0% by mass of sodium...Ch. 12 - Prob. 12.139QPCh. 12 - The freezing point of 0.109 m aqueous formic acid...Ch. 12 - A compound of carbon, hydrogen, and oxygen was...Ch. 12 - A compound of carbon, hydrogen, and oxygen was...
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- Sodium chloride (NaCl) is commonly used to melt ice on roads during the winter. Calcium chloride (CaCl2) is sometimes used for this purpose too. Let us compare the effectiveness of equal masses of these two compounds in lowering the freezing point of water, by calculating the freezing point depression of solutions containing 200. g of each salt in 1.00 kg of water. (An advantage of CaCl2 is that it acts more quickly because it is hygroscopic, that is. it absorbs moisture from the air to give a solution and begin the process. A disadvantage is that this compound is more costly.)arrow_forwardA 0.109 mol/kg aqueous solution of formic acid, HCOOH, freezes at −0.210 °C. Calculate the percent dissociation of formic acid.arrow_forwardUsing KF as an example, write equations that refer to Hsoln and Hhyd Lattice energy was defined in Chapter 3 as H for the reaction K+(g) + F (g) KF(s). Show how you would utilize Hesss law to calculate Hso1n from Hhyd and HLE for KF, where HLE = lattice energy. Hsoln for KF, as for other soluble ionic compounds, is a relatively small number. How can this be since Hhyd and HLE are relatively large negative numbers?arrow_forward
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- a. Use the following data to calculate the enthalpy of hydration for calcium chloride and calcium iodide. Lattice Energy Hsoln CaCl2(s) 2247kj/mol 46kj/mol Cal2(s) 2059kj/mol 104kj/mol b. Based on your answers to part a, which ion, Cl or I, is more strongly attracted to water?arrow_forwardA 1.00 mol/kg aqueous sulfuric acid solution, H2SO4,freezes at 4.04 C. Calculate i, the vant Hoff factor,for sulfuric acid in this solution.arrow_forwardWhich solute has the greatest effect on the boiling pointof 1.00 kg of water: 50.0 g of strontium chloride (SrCl2) or 150.0 g of carbon tetrachloride (CCl4) ? Justify youranswer.arrow_forward
- A 12.0-g sample of a nonelectrolyte is dissolved in 80.0 g of water. The solution freezes at -1.94 C. Calculate the molar mass of the substance.arrow_forwardA forensic chemist is given a white solid that is suspected of being pure cocaine (C17H21NO4, molar mass = 303.35 g/mol). She dissolves 1.22 0.01 g of the solid in 15.60 0.01 g benzene. The freezing point is lowered by 1.32 0.04C. a. What is the molar mass of the substance? Assuming that the percent uncertainty in the calculated molar mass is the same as the percent uncertainty in the temperature change, calculate the uncertainty in the molar mass. b. Could the chemist unequivocally state that the substance is cocaine? For example, is the uncertainty small enough to distinguish cocaine from codeine (C18H21NO3, molar mass = 299.36 g/mol)? c. Assuming that the absolute uncertainties in the measurements of temperature and mass remain unchanged, how could the chemist improve the precision of her results?arrow_forwardFreezing point depression is one means of determining the molar mass of a compound. The freezing point depression constant of benzene is 5.12 C/m. a. When a 0.503 g sample of the white crystalline dimer is dissolved in 10.0 g benzene, the freezing point of benzene is decreased by 0542 C. Verify that the molar mass of the dimer is 475 g/mol when determined by freezing point depression. Assume no dissociation of the dimer occurs. b. The correct molar mass of the dimer is 487 g/mol. Explain why the dissociation equilibrium causes the freezing point depression calculation to yield a lower molar mass for the dimer.arrow_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