Chemistry: Principles and Practice
3rd Edition
ISBN: 9780534420123
Author: Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher: Cengage Learning
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Chapter 19, Problem 19.12QE
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Using the conditions of spontaneity to deduce the signs of AH and AS
Use the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropy
AS.
Note: if you have not been given enough information to decide a sign, select the "unknown" option.
reaction
observations
conclusions
A
This reaction is always spontaneous, but
proceeds slower at temperatures above
120. °C.
ΔΗ is
(pick one)
AS is
(pick one)
ΔΗ is
(pick one)
B
This reaction is spontaneous except above
117. °C.
AS is
(pick one)
ΔΗ is
(pick one)
This reaction is slower below 20. °C than
C
above.
AS is
|(pick one)
?
18
Ar
1
Calculating the pH at equivalence of a titration
Try Again
Your answer is incorrect.
0/5
a
A chemist titrates 70.0 mL of a 0.7089 M hydrocyanic acid (HCN) solution with 0.4574M KOH solution at 25 °C. Calculate the pH at equivalence. The pK of
hydrocyanic acid is 9.21.
Round your answer to 2 decimal places.
Note for advanced students: you may assume the total volume of the solution equals the initial volume plus the volume of KOH solution added.
pH
=
11.43]
G
00.
18
Ar
B•
Biological Macromolecules
Naming and drawing the products of aldose oxidation and reduction
aw a Fischer projection of the molecule that would produce L-ribonic acid if it were subjected to mildly oxidizing reaction conditions.
Click and drag to start drawing a
structure.
X
AP
‡
1/5
Naor
Explanation
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Chapter 19 Solutions
Chemistry: Principles and Practice
Ch. 19 - Prob. 19.1QECh. 19 - Prob. 19.2QECh. 19 - Prob. 19.3QECh. 19 - Prob. 19.4QECh. 19 - Prob. 19.5QECh. 19 - Prob. 19.6QECh. 19 - Prob. 19.7QECh. 19 - Prob. 19.8QECh. 19 - Prob. 19.9QECh. 19 - Prob. 19.10QE
Ch. 19 - Prob. 19.11QECh. 19 - Prob. 19.12QECh. 19 - Prob. 19.13QECh. 19 - Prob. 19.14QECh. 19 - Prob. 19.15QECh. 19 - Prob. 19.16QECh. 19 - Prob. 19.17QECh. 19 - Prob. 19.18QECh. 19 - Prob. 19.19QECh. 19 - Prob. 19.20QECh. 19 - Prob. 19.21QECh. 19 - Prob. 19.22QECh. 19 - Prob. 19.23QECh. 19 - Prob. 19.24QECh. 19 - Prob. 19.25QECh. 19 - Prob. 19.26QECh. 19 - Prob. 19.27QECh. 19 - Prob. 19.28QECh. 19 - Prob. 19.29QECh. 19 - Prob. 19.30QECh. 19 - Prob. 19.31QECh. 19 - Prob. 19.32QECh. 19 - Prob. 19.33QECh. 19 - Prob. 19.34QECh. 19 - Prob. 19.35QECh. 19 - Prob. 19.36QECh. 19 - Prob. 19.37QECh. 19 - Prob. 19.38QECh. 19 - Prob. 19.39QECh. 19 -
What structural feature is used to determine...Ch. 19 - Prob. 19.41QECh. 19 - Prob. 19.42QECh. 19 - Prob. 19.43QECh. 19 - Prob. 19.44QECh. 19 - For each d electron configuration, state the...Ch. 19 - Prob. 19.46QECh. 19 - Prob. 19.47QECh. 19 - For the low-spin complex [Co(en)(NH3)Cl2]ClO4,...Ch. 19 - Prob. 19.49QECh. 19 - Prob. 19.50QECh. 19 - Prob. 19.51QECh. 19 - Prob. 19.52QECh. 19 - Prob. 19.53QECh. 19 - Prob. 19.54QECh. 19 - Prob. 19.55QECh. 19 - Prob. 19.56QECh. 19 - Prob. 19.57QECh. 19 - Prob. 19.58QECh. 19 - Prob. 19.59QECh. 19 - Prob. 19.60QECh. 19 - Prob. 19.61QECh. 19 - Prob. 19.62QECh. 19 - Write all the possible isomers of...Ch. 19 - Prob. 19.64QECh. 19 - Prob. 19.65QECh. 19 - Prob. 19.66QECh. 19 - Prob. 19.67QECh. 19 - Prob. 19.68QECh. 19 - Prob. 19.69QE
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- ion. A student proposes the following Lewis structure for the perchlorate (CIO) io : :0: : Cl : - - : :0: ك Assign a formal charge to each atom in the student's Lewis structure. atom central O formal charge ☐ top O ☐ right O ☐ bottom O ☐ Cl ☐arrow_forwardDecide whether these proposed Lewis structures are reasonable. proposed Lewis structure Yes. Is the proposed Lewis structure reasonable? Cl- : 2: :Z: :Z: N—N : 0: C C1: O CO No, it has the wrong number of valence electrons. The correct number is: ☐ No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are:* ☐ Yes. No, it has the wrong number of valence electrons. The correct number is: ☐ No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are:* | Yes. No, it has the wrong number of valence electrons. The correct number is: No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are:* | If two or more atoms of the same element don't satisfy the octet rule, just enter the chemical symbol as many times as necessary. For example, if two oxygen atoms don't satisfy the octet rule, enter "0,0". ☑arrow_forwardUse the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropy AS. Note: if you have not been given enough information to decide a sign, select the "unknown" option. reaction observations conclusions ΔΗ is (pick one) A This reaction is faster above 103. °C than below. AS is (pick one) ΔΗ is (pick one) B This reaction is spontaneous only above -9. °C. AS is (pick one) ΔΗ is (pick one) C The reverse of this reaction is always spontaneous. AS is (pick one) 18 Ararrow_forward
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