Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN: 9781938168390
Author: Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher: OpenStax
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Textbook Question
Chapter 17, Problem 2E
For the scenario in the previous question, how many electrons moved through the circuit?
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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 17 Solutions
Chemistry by OpenStax (2015-05-04)
Ch. 17 - If a 2.5 A current is run through a circuit for 35...Ch. 17 - For the scenario in the previous question, how...Ch. 17 - For each of the following balanced half-reactions,...Ch. 17 - For each of the following balanced half-reactions,...Ch. 17 - Given the following pairs of balanced...Ch. 17 - Balance the following in acidic solution: (a)...Ch. 17 - Identify the species that undergoes oxidation, the...Ch. 17 - Balance the following in acidic solution: (a)...Ch. 17 - Identify the species that was oxidized, the...Ch. 17 - Why is it not possible for hydroxide ion (OH-) to...
Ch. 17 - Why is it not possible for hydrogen ion (H+) to...Ch. 17 - Why must the charge balance in oxidation-reduction...Ch. 17 - Write the following balanced reactions using cell...Ch. 17 - Given the following cell notations, determine the...Ch. 17 - For the cell notations in the previous problem,...Ch. 17 - Balance the following reactions and write the...Ch. 17 - Identify the species oxidized species reduced, and...Ch. 17 - From the information provided, use cell notation...Ch. 17 - Why is a salt bridge necessary in galvanic cells...Ch. 17 - An active (metal) electrode was found to gain mass...Ch. 17 - An active (metal) electrode was found to lose mass...Ch. 17 - The mass of three different metal electrodes, each...Ch. 17 - For each reaction listed, determine its standard...Ch. 17 - For each reaction listed, determine its standard...Ch. 17 - Determine the overall reaction and its standard...Ch. 17 - Determine the overall reaction and its standard...Ch. 17 - Determine the overall reaction and its standard...Ch. 17 - Determine the overall reaction and its standard...Ch. 17 - For the standard cell potentials given here,...Ch. 17 - For the ?G values given here, determine the...Ch. 17 - Determine the standard cell potential and the cell...Ch. 17 - Determine G and G for each of the reactions in...Ch. 17 - Use the data in Appendix L to determine the...Ch. 17 - What are the desirable qualities of an electric...Ch. 17 - List some things that are typically considered...Ch. 17 - Consider a battery made from one half-cell that...Ch. 17 - Consider a battery with the overall reaction:...Ch. 17 - An inventor proposes using a SHE (standard...Ch. 17 - Why do batteries go dead, but fuel cells do not?Ch. 17 - Explain what happens to battery voltage as a...Ch. 17 - Using the information thus far in this chapter,...Ch. 17 - Which member of each pair of metals is more likely...Ch. 17 - Consider the following metals: Ag, Au, Mg, Ni, and...Ch. 17 - Aluminum (E Al 3+/Al=2.07V) is more easily...Ch. 17 - If a sample of iron and a sample of zinc come into...Ch. 17 - Suppose you have three different metals. A, B, and...Ch. 17 - Why would a sacrificial anode made of lithium...Ch. 17 - Identify the reaction at the anode, reaction at...Ch. 17 - What mass of each product is produced in each of...Ch. 17 - How long would it take to reduce 1 mole of each of...Ch. 17 - A current of 2.345 A passes through the cell shown...Ch. 17 - An irregularly shaped metal part made from a...
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