Concept explainers
Vapor-pressure lowering is a colligative property, as are freezing-point depression and boiling-point elevation. What is a colligative property? Why is the freezing point depressed for a solution as compared to the pure solvent? Why is the boiling point elevated for a solution as compared to the pure solvent? Explain how to calculate ∆T for a freezing-point depression problem or a boiling-point elevation problem. Of the solvents listed in Table 10-5, which would have the largest freezing-point depression for a 0.50 molal solution? Which would have the smallest boiling-point elevation for a 0.50 molal solution?
A common application of freezing-point depression and boiling-point elevation experiments is to provide a means to calculate the molar mass of a nonvolatile solute. What data are needed to calculate the molar mass of a nonvolatile solute? Explain how you would manipulate these data to calculate the molar mass of the nonvolatile solute.
Want to see the full answer?
Check out a sample textbook solutionChapter 11 Solutions
EBK CHEMISTRY
Additional Science Textbook Solutions
Genetic Analysis: An Integrated Approach (3rd Edition)
SEELEY'S ANATOMY+PHYSIOLOGY
Human Physiology: An Integrated Approach (8th Edition)
Principles of Anatomy and Physiology
- 2. Please consider the two all 'cis' isomers of trimethylcyclohexane drawn below. Draw the two chair conformers of each stereoisomer below (1 and 2) and calculate their torsional interaction energies in order to identify the lower energy conformer for each stereoisomer. Based on your calculations, state which of the two stereoisomers 1 and 2 is less stable and which is more stable. [1,3-diaxial CH3 CH3 = 3.7kcal/mol; 1,3-diaxial CH3 H = 0.88kcal/mol; cis-1,2 (axial:equatorial) CH3 CH3 = 0.88kcal/mol; trans-1,2-diequatorial CH3 CH3 = 0.88kcal/mol) all-cis-1,2,3- 1 all-cis-1,2,4- 2arrow_forwardNonearrow_forwardWhat is the mechanism by which the 1,4 product is created? Please draw it by hand with arrows and stuff.arrow_forward
- What is the relationship between A and B? H3C A Br Cl H3C B Br relationship (check all that apply) O same molecule O enantiomer O diastereomer structural isomer O stereoisomer isomer O need more information to decide O same molecule ☐ enantiomer Br Br Br CH3 Br CI CH3 O diastereomer ☐ structural isomer ☐ stereoisomer isomer O need more information to decide O same molecule O enantiomer Odiastereomer structural isomer O stereoisomer ☐ isomer O need more information to decidearrow_forwardb. Please complete the zig-zag conformation of the compound (3R,4S)-3,4-dichloro-2,5-dimethylhexane by writing the respective atoms in the boxes. 4arrow_forwardc. Serricornin, the female-produced sex pheromone of the cigarette beetle, has the following structure. OH What is the maximum number of possible stereoisomers? Is this structure a meso compound? d. Please consider the natural product alkaloids shown below. Are these two structures enantiomers, diastereomers or conformers? H HO H H HN HO HN R R с R=H cinchonidine R=ET cinchonine Harrow_forward
- Nail polish remover containing acetone was spilled in a room 5.23 m × 3.28 m × 2.76 m. Measurements indicated that 2,250 mg of acetone evaporated. Calculate the acetone concentration in micrograms per cubic meter.arrow_forwardPlease help me answer number 1. 1. If your graphs revealed a mathematical relationship between specific heat and atomic mass, write down an equation for the relationship. I also don't understand, is the equation from the line regression the one that I'm suppose use to show the relationship? If so could you work it all the way out?arrow_forwardDescribe the principle of resonance and give a set of Lewis Structures to illustrate your explanation.arrow_forward
- Don't used hand raitingarrow_forwardIt is not unexpected that the methoxyl substituent on a cyclohexane ring prefers to adopt the equatorial conformation. OMe H A G₂ = +0.6 kcal/mol OMe What is unexpected is that the closely related 2-methoxytetrahydropyran prefers the axial conformation: H H OMe OMe A Gp=-0.6 kcal/mol Methoxy: CH3O group Please be specific and clearly write the reason why this is observed. This effect that provides stabilization of the axial OCH 3 group in this molecule is called the anomeric effect. [Recall in the way of example, the staggered conformer of ethane is more stable than eclipsed owing to bonding MO interacting with anti-bonding MO...]arrow_forward206 Pb 82 Express your answers as integers. Enter your answers separated by a comma. ▸ View Available Hint(s) VAΣ ΜΕ ΑΣΦ Np, N₁ = 82,126 Submit Previous Answers ? protons, neutronsarrow_forward
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistry: An Atoms First ApproachChemistryISBN:9781305079243Author:Steven S. Zumdahl, Susan A. ZumdahlPublisher:Cengage Learning
- General, Organic, and Biological ChemistryChemistryISBN:9781285853918Author:H. Stephen StokerPublisher:Cengage LearningPrinciples of Modern ChemistryChemistryISBN:9781305079113Author:David W. Oxtoby, H. Pat Gillis, Laurie J. ButlerPublisher:Cengage LearningChemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage Learning