Chemistry for Today: General, Organic, and Biochemistry
9th Edition
ISBN: 9781305960060
Author: Spencer L. Seager, Michael R. Slabaugh, Maren S. Hansen
Publisher: Cengage Learning
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Chapter 11, Problem 11.21E
Interpretation Introduction
Interpretation:
The structural isomers among the given compounds are to be grouped together.
Concept introduction:
The compounds that have same molecular formula but different connectivity of atoms are known as structural isomers. The structural isomers involve chain isomerism, position isomerism,
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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•
Chapter 11 Solutions
Chemistry for Today: General, Organic, and Biochemistry
Ch. 11 - Prob. 11.1ECh. 11 - Prob. 11.2ECh. 11 - Prob. 11.3ECh. 11 - Prob. 11.4ECh. 11 - Prob. 11.5ECh. 11 - Prob. 11.6ECh. 11 - Prob. 11.7ECh. 11 - Prob. 11.8ECh. 11 - Prob. 11.9ECh. 11 - Prob. 11.10E
Ch. 11 - Prob. 11.11ECh. 11 - Prob. 11.12ECh. 11 - Prob. 11.13ECh. 11 - Prob. 11.14ECh. 11 - What molecular geometry exists when a central...Ch. 11 - Compare the shapes of unhybridized p and...Ch. 11 - Use Example 11.1 and Tables 11.2 and 11.6 to...Ch. 11 - Prob. 11.18ECh. 11 - Prob. 11.19ECh. 11 - Prob. 11.20ECh. 11 - Prob. 11.21ECh. 11 - Prob. 11.22ECh. 11 - Prob. 11.23ECh. 11 - Write a condensed structural formula for the...Ch. 11 - Write a condensed structural formula for the...Ch. 11 - Write an expanded structural formula for the...Ch. 11 - Prob. 11.27ECh. 11 - Classify each of the following compounds as a...Ch. 11 - Why are different conformations of an alkane not...Ch. 11 - Which of the following pairs represent structural...Ch. 11 - Prob. 11.31ECh. 11 - Prob. 11.32ECh. 11 - Identify the following alkyl groups: a. b....Ch. 11 - Prob. 11.34ECh. 11 - Prob. 11.35ECh. 11 - Draw a condensed structural formula for each of...Ch. 11 - Prob. 11.37ECh. 11 - Prob. 11.38ECh. 11 - Prob. 11.39ECh. 11 - Prob. 11.40ECh. 11 - The following names are incorrect, according to...Ch. 11 - The following names are incorrect, according to...Ch. 11 - Prob. 11.43ECh. 11 - Write the correct IUPAC name for each of the...Ch. 11 - Write the correct IUPAC name for each of the...Ch. 11 - Draw the structural formulas corresponding to each...Ch. 11 - Prob. 11.47ECh. 11 - Which of the following pairs of cycloalkanes...Ch. 11 - Prob. 11.49ECh. 11 - Prob. 11.50ECh. 11 - Prob. 11.51ECh. 11 - Which of the following cycloalkanes could show...Ch. 11 - Prob. 11.53ECh. 11 - Using the prefix cis- or trans-, name each of the...Ch. 11 - Prob. 11.55ECh. 11 - The compound decane is a straight-chain alkane....Ch. 11 - Explain why alkanes of low molecular weight have...Ch. 11 - Suppose you have a sample of 2-methylhexane and a...Ch. 11 - Identify circle the alkanelike portions of the...Ch. 11 - Prob. 11.60ECh. 11 - Prob. 11.61ECh. 11 - Write a balanced equation for the incomplete...Ch. 11 - Prob. 11.63ECh. 11 - Prob. 11.64ECh. 11 - Prob. 11.65ECh. 11 - Prob. 11.66ECh. 11 - Prob. 11.67ECh. 11 - Prob. 11.68ECh. 11 - Would you expect a molecule of urea produced in...Ch. 11 - Prob. 11.70ECh. 11 - Prob. 11.71ECh. 11 - Prob. 11.72ECh. 11 - Prob. 11.73ECh. 11 - Prob. 11.74ECh. 11 - Prob. 11.75ECh. 11 - A semi-truck loaded with cyclohexane overturns...Ch. 11 - Prob. 11.77ECh. 11 - Oil spills along coastal shores can be disastrous...Ch. 11 - Prob. 11.79ECh. 11 - Prob. 11.80ECh. 11 - Use the generic formula for alkanes (CnH2n+2) to...Ch. 11 - Prob. 11.82ECh. 11 - Which of the following is an example of an alkane?...Ch. 11 - Prob. 11.84ECh. 11 - Prob. 11.85ECh. 11 - Prob. 11.86ECh. 11 - The deadly property of carbon monoxide, if...
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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 The reverse of this reaction is always spontaneous but proceeds faster at temperatures above -48. °C. ΔΗ is (pick one) ✓ AS is (pick one) B This reaction is spontaneous except below 114. °C but proceeds at a slower rate below 135. °C. ΔΗ is (pick one) AS is (pick one) ΔΗ is C This reaction is exothermic and proceeds faster at temperatures above -43. °C. (pick one) AS is (pick one) v Х 5 ? 18 Ararrow_forwardion. 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_forward
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