General Chemistry: Atoms First
2nd Edition
ISBN: 9780321809261
Author: John E. McMurry, Robert C. Fay
Publisher: Prentice Hall
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Chapter 14.5, Problem 14.11P
Calculate the pH of each of the following solutions:
- (a) A sample of seawater that has an OH–concentration of 1.58 × 10–6 M
- (b) A sample of acid rain that has an H3O+ concentration of 6.0 × 10–5 M
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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
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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
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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•
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Chapter 14 Solutions
General Chemistry: Atoms First
Ch. 14.1 - Write a balanced equation for the dissociation of...Ch. 14.1 - What is the conjugate acid of each of the...Ch. 14.1 - Prob. 14.3CPCh. 14.1 - Some of the following ions have been detected...Ch. 14.2 - If you mix equal concentrations of reactants and...Ch. 14.2 - The following pictures represent aqueous solutions...Ch. 14.3 - Prob. 14.7PCh. 14.4 - Prob. 14.8PCh. 14.4 - The concentration of OH in a sample of seawater is...Ch. 14.4 - Prob. 14.10P
Ch. 14.5 - Calculate the pH of each of the following...Ch. 14.5 - Prob. 14.12PCh. 14.7 - Calculate the pH of the following solutions: (a)...Ch. 14.7 - Prob. 14.14PCh. 14.8 - The pH of 0.10 M HOCl is 4.23. Calculate Ka and...Ch. 14.8 - The following pictures represent aqueous solutions...Ch. 14.9 - Acetic acid, CH3CO2H, is the solute that gives...Ch. 14.9 - Prob. 14.18PCh. 14.10 - Prob. 14.19PCh. 14.11 - Calculate the pH and the concentrations of all...Ch. 14.11 - Prob. 14.21PCh. 14.12 - Calculate the pH and the concentrations of all...Ch. 14.12 - Prob. 14.23PCh. 14.13 - (a) Piperidine (C5H11N) is an amine found in black...Ch. 14.14 - Predict whether the following salt solutions are...Ch. 14.14 - Prob. 14.26PCh. 14.14 - Calculate Ka for the cation and Kb for the anion...Ch. 14.14 - Classify each of the following salt solutions as...Ch. 14.15 - For each of the following reactions, identify the...Ch. 14.15 - Prob. 14.30CPCh. 14.15 - Prob. 14.31PCh. 14.15 - Prob. 14.32PCh. 14 - For each of the following reactions, identify the...Ch. 14 - The following pictures represent aqueous solutions...Ch. 14 - Prob. 14.35CPCh. 14 - Which of the following pictures best represents an...Ch. 14 - The following pictures represent aqueous solutions...Ch. 14 - Prob. 14.38CPCh. 14 - The following picture represents the hydrated...Ch. 14 - Prob. 14.40CPCh. 14 - Prob. 14.41CPCh. 14 - Prob. 14.42CPCh. 14 - Prob. 14.43CPCh. 14 - Give three examples of molecules or ions that are...Ch. 14 - Prob. 14.45SPCh. 14 - Prob. 14.46SPCh. 14 - Give the formula for the conjugate acid of each of...Ch. 14 - For each of the following reactions, identify the...Ch. 14 - For each of the following reactions, identify the...Ch. 14 - Which of the following species behave as strong...Ch. 14 - Which acid in each of the following pairs has the...Ch. 14 - Prob. 14.52SPCh. 14 - Prob. 14.53SPCh. 14 - Prob. 14.54SPCh. 14 - Arrange each group of compounds in order of...Ch. 14 - Prob. 14.56SPCh. 14 - Prob. 14.57SPCh. 14 - Prob. 14.58SPCh. 14 - Identify the stronger base in each of the...Ch. 14 - Prob. 14.60SPCh. 14 - For each of the following solutions, calculate...Ch. 14 - Prob. 14.62SPCh. 14 - Prob. 14.63SPCh. 14 - Calculate the pH to the correct number of...Ch. 14 - Prob. 14.65SPCh. 14 - Calculate the H3O+ concentration to the correct...Ch. 14 - Prob. 14.67SPCh. 14 - Prob. 14.68SPCh. 14 - Prob. 14.69SPCh. 14 - Prob. 14.70SPCh. 14 - A solution of KOH has a pH of 10.00. How many...Ch. 14 - Prob. 14.72SPCh. 14 - Calculate the pH of solutions prepared by: (a)...Ch. 14 - Prob. 14.74SPCh. 14 - Look up the values of Ka in Appendix C for HCO2H,...Ch. 14 - The pH of 0.040 M hypobromous acid (HOBr) is 5.05....Ch. 14 - Prob. 14.77SPCh. 14 - Acrylic acid (C3H4O2) is used in the manufacture...Ch. 14 - Prob. 14.79SPCh. 14 - Prob. 14.80SPCh. 14 - Prob. 14.81SPCh. 14 - Write balanced net ionic equations and the...Ch. 14 - Prob. 14.83SPCh. 14 - Calculate the pH and the concentrations of all...Ch. 14 - Prob. 14.85SPCh. 14 - Oxalic acid (H2C2O4) is a diprotic acid that...Ch. 14 - Prob. 14.87SPCh. 14 - Write a balanced net ionic equation and the...Ch. 14 - Write a balanced net ionic equation and the...Ch. 14 - Prob. 14.90SPCh. 14 - Prob. 14.91SPCh. 14 - Oxycodone (C18H21NO4), a narcotic analgesic, is a...Ch. 14 - Prob. 14.93SPCh. 14 - Using values of Kb, in Appendix C, calculate...Ch. 14 - Prob. 14.95SPCh. 14 - Prob. 14.96SPCh. 14 - Write a balanced net ionic equation for the...Ch. 14 - Prob. 14.98SPCh. 14 - Classify each of the following salt solutions as...Ch. 14 - Calculate the concentrations of all species...Ch. 14 - Prob. 14.101SPCh. 14 - For each of the following reactions, identify the...Ch. 14 - For each of the following reactions, identify the...Ch. 14 - Prob. 14.104SPCh. 14 - For each of the Lewis acid-base reactions in...Ch. 14 - Classify each of the following as a Lewis acid or...Ch. 14 - Which would you expect to be the stronger Lewis...Ch. 14 - Prob. 14.108CHPCh. 14 - Prob. 14.109CHPCh. 14 - Prob. 14.110CHPCh. 14 - Prob. 14.111CHPCh. 14 - Prob. 14.112CHPCh. 14 - Use the conjugate acidbase pair HCN and CN to...Ch. 14 - Prob. 14.114CHPCh. 14 - Prob. 14.115CHPCh. 14 - Nicotine (C10H14N2) can accept two protons because...Ch. 14 - Prob. 14.117CHPCh. 14 - The hydrated cation M(H2O)63+ has Ka = 104, and...Ch. 14 - Calculate the pH and the concentrations of all...Ch. 14 - Prob. 14.120CHPCh. 14 - Prob. 14.121CHPCh. 14 - Prob. 14.122CHPCh. 14 - Prob. 14.123CHPCh. 14 - Prob. 14.124CHPCh. 14 - Prob. 14.125CHPCh. 14 - Prob. 14.126CHPCh. 14 - Prob. 14.127CHPCh. 14 - Prob. 14.128CHPCh. 14 - What is the pH and the principal source of H3O+...Ch. 14 - Prob. 14.130CHPCh. 14 - Prob. 14.131CHPCh. 14 - Prob. 14.132MPCh. 14 - Prob. 14.133MPCh. 14 - In aqueous solution, sodium acetate behaves as a...Ch. 14 - During a certain time period, 4.0 million tons of...Ch. 14 - Prob. 14.136MPCh. 14 - Prob. 14.137MPCh. 14 - Prob. 14.138MPCh. 14 - Prob. 14.139MP
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