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Wertz-Chemistry: A Quantitative Science 3/e (Homework)

James Finch

Chemistry - College, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 0 / 15

Due : Wednesday, March 25, 2020 08:00 EDT

Last Saved : n/a Saving...  ()

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  • Instructions

    WebAssign is proud to be the exclusive online homework solution for Chemistry: A Quantitative Science 3rd Edition, a two-part textbook series by Dennis Wertz of North Carolina State University.

    Chemistry: A Quantitative Science is the second semester general chemistry text, following the first semester text, Chemistry: A Molecular Science. It emphasizes the more quantitative aspects of chemistry, including the topics of stoichiometry, thermodynamics, solution chemistry, equilibrium, acid-base chemistry, electrochemistry, nuclear chemistry, and kinetics.

    The WebAssign component of this textbook includes a complete bank of homework and assessment questions. Each question includes a link to the digital version of the relevant chapter of the printable eBook. The eBook is fully interactive and includes embedded video clips, practice exercises, and hyperlinks to additional resources and other relevant material.

    Below is a selection of questions related to equilibrium chemistry showing some of the capabilities. These questions show that in addition to being able to randomize the numbers presented to students, randomized chemical formulas and reactions also provide more variety to students. ChemPad can be used to input chemical formulas (question 8.P.002.), equilibrium and Ksp expressions (question 8.P.007.), chemical reactions (question 8.P.009.), and ranking of atoms and molecules by property (question 8.P.022.) Numeric questions can handle the full range of chemically relevant values, including extremely small values found in only slightly soluble compounds (question 8.P.012.).

    View the complete list of WebAssign questions available for this textbook. This demo assignment allows many submissions and allows you to try another version of the same question for practice wherever the problem has randomized values.

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1. –/1 points WertzCAQS3 8.P.002. My Notes
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What is the conjugate base of Fe(H2O)63+?

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2. –/3 points WertzCAQS3 8.P.007. My Notes
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Express the Ksp expression of each of the following compounds in terms of its molar solubility (x). (Use the form Ksp = 2x5 to enter your answer. Subscripts and superscripts that include letters must be enclosed in braces {}.)
(a)    CoS

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(b)    HgI2

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(c)    Ag2S

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3. –/4 points WertzCAQS3 8.P.009. My Notes
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Write the chemical equations for the dissociation of each of the following substances and determine their molar solubilities. (Use the lowest possible whole number coefficients. Include states-of-matter under the given conditions in your answer. See the appendix.)
(a)    AgI

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(b)    CaF2

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4. –/1 points WertzCAQS3 8.P.012. My Notes
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The solubility of copper(I) iodide is 4.3 ✕ 10−4 g/L. What is the Ksp of copper(I) iodide?
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5. –/1 points WertzCAQS3 8.P.016. My Notes
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Calculate the pH of a saturated solution of zinc hydroxide. (See the appendix.)
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6. –/1 points WertzCAQS3 8.P.022. My Notes
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Rank the following sulfides in order of decreasing solubility: CuS, CdS, ZnS, Ag2S. (Use the appropriate <, =, or > symbol to separate substances in the list. See the appendix.)

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7. –/3 points WertzCAQS3 8.P.023. My Notes
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Would a precipitate form in a solution that contained the following concentrations? (See the appendix.)
(a)    0.04 M NaCl and 0.01 M Pb(NO3)2
    

(b)    7.5 mM AgNO3 and 6 µM NaCl
    

(c)    7.4 mM KI and 4.5 mM Pb(NO3)2
    

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8. –/1 points WertzCAQS3 8.P.032. My Notes
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What [I −] is needed to start precipitation of AgI from a saturated solution of AgCl? (See the appendix.)
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