EBK CHEMICAL PRINCIPLES
8th Edition
ISBN: 8220101425812
Author: DECOSTE
Publisher: Cengage Learning US
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Chapter 4, Problem 54E
Interpretation Introduction
Interpretation: The mass percent of douglasite the sample is to be calculated.
Concept introduction: The ratio of the mass of a compound in the sample of mixture containing two or more compounds to the totalmass of the mixture multiplied by
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LTS
Solid:
AT=Te-Ti
Trial 1
Trial 2
Trial 3
Average
ΔΗ
Mass water, g
24.096
23.976
23.975
Moles of solid, mol
0.01763
001767
0101781
Temp. change, °C
2.9°C
11700
2.0°C
Heat of reaction, J
-292.37J -170.473
-193.26J
AH, kJ/mole
16.58K 9.647 kJ 10.85 kr
16.58K59.64701
KJ
mol
12.35k
Minimum AS,
J/mol K
41.582
mol-k
Remember: q = mCsAT (m = mass of water, Cs=4.184J/g°C) & qsin =-qrxn &
Show your calculations for:
AH in J and then in kJ/mole for Trial 1:
qa (24.0969)(4.1845/g) (-2.9°C)=-292.37J
qsin =
qrxn =
292.35 292.37J
AH in J = 292.375 0.2923kJ
0.01763m01
=1.65×107
AH in kJ/mol =
=
16.58K
0.01763mol
mol
qrx
Minimum AS in J/mol K (Hint: use the average initial temperature of the three trials, con
Kelvin.)
AS=AHIT
(1.65×10(9.64×103) + (1.0
Jimai
For the compound: C8H17NO2
Use the following information to come up with a plausible structure:
8
This compound has "carboxylic acid amide" and ether functional groups.
The peaks at 1.2ppm are two signals that are overlapping one another.
One of the two signals is a doublet that represents 6 hydrogens; the
other signal is a quartet that represents 3 hydrogens.
Vnk the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest bolling
point, choose 2 next to the substance with the next highest boiling point, and so on.
substance
C
D
chemical symbol,
chemical formula
or Lewis structure.
CH,-N-CH,
CH,
H
H 10: H
C-C-H
H H H
Cale
H 10:
H-C-C-N-CH,
Bri
CH,
boiling point
(C)
Сен
(C) B
(Choose
Chapter 4 Solutions
EBK CHEMICAL PRINCIPLES
Ch. 4 - Prob. 1DQCh. 4 - Prob. 2DQCh. 4 - Prob. 3DQCh. 4 - Prob. 4DQCh. 4 - Prob. 5DQCh. 4 - The exposed electrodes of a light bulb are placed...Ch. 4 - Prob. 7DQCh. 4 - Prob. 8DQCh. 4 - Consider separate aqueous solutions of HCland...Ch. 4 - Prob. 10DQ
Ch. 4 - Prob. 11DQCh. 4 - Characterize strong electrolytes versus weak...Ch. 4 - The figures below are molecular-level...Ch. 4 - Prob. 14ECh. 4 - Differentiate between what happens when the...Ch. 4 - Commercial cold packs and hot packs are available...Ch. 4 - Prob. 17ECh. 4 - Prob. 18ECh. 4 - Prob. 19ECh. 4 - Prob. 20ECh. 4 - Prob. 21ECh. 4 - Prob. 22ECh. 4 - Prob. 23ECh. 4 - Prob. 24ECh. 4 - Prob. 25ECh. 4 - Prob. 26ECh. 4 - Prob. 27ECh. 4 - Prob. 28ECh. 4 - Prob. 29ECh. 4 - A stock solution containing Mn2+ ions is prepared...Ch. 4 - Prob. 31ECh. 4 - Prob. 32ECh. 4 - List the formulas of three soluble bromide salts...Ch. 4 - Prob. 34ECh. 4 - Prob. 35ECh. 4 - Prob. 36ECh. 4 - Prob. 37ECh. 4 - Prob. 38ECh. 4 - Write the balanced molecular, complete, and net...Ch. 4 - How would you separate the following ions in...Ch. 4 - Prob. 41ECh. 4 - Prob. 42ECh. 4 - Prob. 43ECh. 4 - What volume of 0.100 M Na3PO4 is required to...Ch. 4 - Prob. 45ECh. 4 - Prob. 46ECh. 4 - Prob. 47ECh. 4 - The following drawings represent aqueous...Ch. 4 - Prob. 49ECh. 4 - Prob. 50ECh. 4 - Prob. 51ECh. 4 - Prob. 52ECh. 4 - Saccharin (C7H5NO3S) is sometimes dispensed in...Ch. 4 - Prob. 54ECh. 4 - A 1.42-g sample of a pure compound with formula...Ch. 4 - Prob. 56ECh. 4 - Prob. 57ECh. 4 - Prob. 58ECh. 4 - Prob. 59ECh. 4 - Prob. 60ECh. 4 - Prob. 61ECh. 4 - Prob. 62ECh. 4 - Prob. 63ECh. 4 - Sodium hydroxide solution is usually standardized...Ch. 4 - Prob. 65ECh. 4 - Prob. 66ECh. 4 - Prob. 67ECh. 4 - A student titrates an unknown amount of...Ch. 4 - Prob. 69ECh. 4 - Prob. 70ECh. 4 - Hydrochloric acid (75.0 mL of 0.250 M) is added...Ch. 4 - Prob. 72ECh. 4 - Prob. 73ECh. 4 - Prob. 74ECh. 4 - Prob. 75ECh. 4 - Prob. 76ECh. 4 - Prob. 77ECh. 4 - Prob. 78ECh. 4 - Prob. 79ECh. 4 - Balance each of the following oxidationreduction...Ch. 4 - Prob. 81ECh. 4 - Prob. 82ECh. 4 - Prob. 83ECh. 4 - Prob. 84ECh. 4 - Prob. 85ECh. 4 - Prob. 86ECh. 4 - Prob. 87ECh. 4 - Prob. 88ECh. 4 - Prob. 89ECh. 4 - Prob. 90ECh. 4 - Prob. 91AECh. 4 - Prob. 92AECh. 4 - Consider a 1.50-g mixture of magnesium nitrate...Ch. 4 - Suppose 50.0 mL of 0.250 M CoCl2 solution is added...Ch. 4 - Prob. 95AECh. 4 - A mixture contains only NaCland Fe(NO3)3 . A...Ch. 4 - A mixture contains only sodium chloride and...Ch. 4 - Prob. 98AECh. 4 - A student added 50.0 mL of an NaOH solution...Ch. 4 - In a 1-L beaker, 203 mL of 0.307 M ammonium...Ch. 4 - It took 25.060.05 mL of a sodium hydroxide...Ch. 4 - You wish to prepare 1 L of a 0.02 M potassium...Ch. 4 - Citric acid, which can be obtained from lemon...Ch. 4 - Acetylsalicylic acid is the active ingredient in...Ch. 4 - A 6.50-g sample of a diprotic acid requires 137.5...Ch. 4 - Prob. 106AECh. 4 - Chlorisondamine chloride (C14H20Cl6N2) is a drug...Ch. 4 - Calculate the concentration of all ions present...Ch. 4 - A solution is prepared by dissolving 0.6706 g...Ch. 4 - For the following chemical reactions, determine...Ch. 4 - What volume of 0.100 M NaOH is required to...Ch. 4 - Prob. 112AECh. 4 - A 450.0-mL sample of a 0.257-M solution of silver...Ch. 4 - Prob. 114AECh. 4 - A 50.00-mL sample of aqueous Ca(OH)2 requires34.66...Ch. 4 - When organic compounds containing sulfur are...Ch. 4 - Assign the oxidation state for the element listed...Ch. 4 - The blood alcohol (C2H5OH) level can be determined...Ch. 4 - Zinc and magnesium metal each react with...Ch. 4 - A 10.00-g sample consisting of a mixture of...Ch. 4 - Consider the reaction of 19.0 g of zinc with...Ch. 4 - Consider an experiment in which two burets, Y and...Ch. 4 - A sample is a mixture of KCl and KBr. When 0.1024...Ch. 4 - You made 100.0 mL of a lead(II) nitrate solution...Ch. 4 - Polychlorinated biphenyls (PCBs) have been used...Ch. 4 - Prob. 126CPCh. 4 - Prob. 127CPCh. 4 - Chromium has been investigated as a coating for...Ch. 4 - Prob. 129CPCh. 4 - Three students were asked to find the identity of...Ch. 4 - A sample is a mixture of AgNO3,CuCl2,andFeCl3...Ch. 4 - Prob. 132MPCh. 4 - You have two 500.0-mL aqueous solutions. Solution...
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