Chemistry: Structure and Properties, Books a la Carte PACKAGE W/MasteringChemistry, 2nd Edition
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ISBN: 9780134777559
Author: Tro, Nivaldo J.
Publisher: PEARSON
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Chapter 16, Problem 62E
Interpretation Introduction
To determine: Mass of HClO4 required in 0.500 L of solution to obtain a solution with each of the given pH value.
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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 16 Solutions
Chemistry: Structure and Properties, Books a la Carte PACKAGE W/MasteringChemistry, 2nd Edition
Ch. 16 - In the opening section of this chapter text, we...Ch. 16 - What are the general physical and chemical...Ch. 16 - What is a carboxylic acid? Give an example?Ch. 16 - What is the Arrhenius definition of an acid? Of a...Ch. 16 - What is a hydronium ion? Does H+ exist in solution...Ch. 16 - What is the Bronsted-Lowry definition of an acid?...Ch. 16 - Why is there more than one definition of acid-base...Ch. 16 - Describe amphoteric behavior and give an example.Ch. 16 - What is a conjugate acid-base pair? Provide an...Ch. 16 - Explain the difference between a strong acid and a...
Ch. 16 - For a binary acid, H-Y, which factors affect the...Ch. 16 - Which factors affect the relative acidity of an...Ch. 16 - What are diprotic and triprotic acids? List an...Ch. 16 - Define the acid ionization constant and explain...Ch. 16 - Write an equation for the autoionization of water...Ch. 16 - What happens to the [OH-] of a solution when the...Ch. 16 - Define pH. What pH range is considered acidic?...Ch. 16 - Define pOH. What pOH range is considered acidic?...Ch. 16 - In most solutions containing a strong or weak...Ch. 16 - When calculating [H3O+] for weak acid solutions,...Ch. 16 - What is the percent ionization of an acid? Explain...Ch. 16 - In calculating [H3O+] for a mixture of a strong...Ch. 16 - Write a generic equation showing how a weak base...Ch. 16 - How can you identified if an anion will act as a...Ch. 16 - What is the relationship between the acid...Ch. 16 - What kinds of cations act as weak acids? List some...Ch. 16 - When calculating the [H3O+] for a polyprotic acid,...Ch. 16 - For a weak diprotic acid H2X, what is the...Ch. 16 - Prob. 29ECh. 16 - Prob. 30ECh. 16 - Identify each substance as an acid or a base and...Ch. 16 - Identify each substance as an acid or a base and...Ch. 16 - In each reaction, identify the Bronsted-Lowry...Ch. 16 - In each reaction, identify the Bronsted-Lowry...Ch. 16 - Write the formula for the conjugate base of each...Ch. 16 - Write the formula for the conjugate acid of each...Ch. 16 - Both H2O and H2PO4 are amphoteric. Write an...Ch. 16 - Both HCO3 and HS are amphoteric. Write an equation...Ch. 16 - Prob. 39ECh. 16 - Based on molecular structure, arrange the binary...Ch. 16 - Based on their molecular structure, pick the...Ch. 16 - Based on molecular structure, arrange the oxyacids...Ch. 16 - Prob. 43ECh. 16 - Which is a stronger base, PO43 or AsO43 ? Explain.Ch. 16 - Classify each acid as strong or weak. If the acid...Ch. 16 - Classify each acid as strong or weak. If the acid...Ch. 16 - The three diagrams represent three different...Ch. 16 - Rank the solutions in order of decreasing [H3O+] :...Ch. 16 - Calculate [OH-] in each aqueous solution at 25°C,...Ch. 16 - Calculate [H3O+] in each aqueous solution at 25°C,...Ch. 16 - Calculate the pH and pH of each solution....Ch. 16 - Calculate [H3O+] and [OH-] for each solution. pH =...Ch. 16 - Complete the table. (All solutions are at 25°C.)...Ch. 16 - Prob. 54ECh. 16 - all equilibrium constants, the value of Kw depends...Ch. 16 - The value of KWincreases with temperature. Is the...Ch. 16 - Calculate the pH of each acid solution. Explain...Ch. 16 - Find the concentration of H3O+, to the correct...Ch. 16 - For each strong acid solution, determine [H3O+],...Ch. 16 - Prob. 60ECh. 16 - What mass of HI should be present in 0.250 L of...Ch. 16 - Prob. 62ECh. 16 - What is the pH of solution in which 224 mL of...Ch. 16 - What volume of a concentrated HCl solution, which...Ch. 16 - Determine the [H3O+] and pH of a 0.100 M solution...Ch. 16 - Prob. 66ECh. 16 - Determine the pH of an HNO2 solution of each...Ch. 16 - Determine the pH of an HF solution of each...Ch. 16 - If 15.0 mL of glacial acetic acid (pure HC2H3O2)...Ch. 16 - Calculate the pH of a formic acid solution that...Ch. 16 - A 0.185 M solution of a weak acid (HA) has a pH of...Ch. 16 - Prob. 72ECh. 16 - Determine the percent ionization of a 0.125 M HCN...Ch. 16 - Determine the percent ionization of a 0.225 M...Ch. 16 - Calculate the percent ionization of an acetic acid...Ch. 16 - Calculate the percent ionization of a formic acid...Ch. 16 - A 0.148 M solution of a monoprotic acid has a...Ch. 16 - Prob. 78ECh. 16 - Prob. 79ECh. 16 - Prob. 80ECh. 16 - Find the pH of each mixture of acids. 0.115 M in...Ch. 16 - Find the pH of each mixture of acids. 0.075 M in...Ch. 16 - For each strong base solution, determine [OH-],...Ch. 16 - Prob. 84ECh. 16 - Prob. 85ECh. 16 - Prob. 86ECh. 16 - Prob. 87ECh. 16 - Prob. 88ECh. 16 - Prob. 89ECh. 16 - Prob. 90ECh. 16 - Determine the [OH-], pH, and pOH of a 0.15 ammonia...Ch. 16 - Determine the [OH-], pH, and pOH of a solution...Ch. 16 - Prob. 93ECh. 16 - Prob. 94ECh. 16 - Prob. 95ECh. 16 - Prob. 96ECh. 16 - Determine if each anion is basic or neutral. For...Ch. 16 - Determine whether each anion is basic or neutral....Ch. 16 - Prob. 99ECh. 16 - Determine the [OH-] and pH of a solution is 0.250...Ch. 16 - Determine whether each cation is acidic or...Ch. 16 - Prob. 102ECh. 16 - Determine if each salt will form a solution that...Ch. 16 - Prob. 104ECh. 16 - Prob. 105ECh. 16 - Prob. 106ECh. 16 - Prob. 107ECh. 16 - Prob. 108ECh. 16 - Prob. 109ECh. 16 - Prob. 110ECh. 16 - Prob. 111ECh. 16 - Prob. 112ECh. 16 - Write chemical equations and corresponding...Ch. 16 - Prob. 114ECh. 16 - Prob. 115ECh. 16 - Calculate the [H3O+] and pH of each polyprotic...Ch. 16 - Calculate the concentration of each species in a...Ch. 16 - Calculate the concentration of each species in a...Ch. 16 - Calculate the [H3O+] and pH of each H2S04...Ch. 16 - Consider a 0.10 M solution of a weak polyprotic...Ch. 16 - Classify each species as a Lewis acid or a Lewis...Ch. 16 - Prob. 122ECh. 16 - Prob. 123ECh. 16 - Prob. 124ECh. 16 - Prob. 125ECh. 16 - Based on these molecular views, determine whether...Ch. 16 - The binding of oxygen by hemoglobin in the blood...Ch. 16 - Carbon dioxide dissolves in water according to the...Ch. 16 - People often take Milk of Magnesia to reduce the...Ch. 16 - Lakes that have been acidified by acid rain (which...Ch. 16 - Acid rain over the Great lakes has a pH of about...Ch. 16 - White wines tend to be more acidic than red wines....Ch. 16 - Common aspirin is acetylsalicylic acid, which has...Ch. 16 - The AIDS drug zalcitabine (also known as ddC) is a...Ch. 16 - Determine the pH of each solution. 0.0100MHCIO4...Ch. 16 - Determine the pH of each solution. 0.0650M HNO3...Ch. 16 - Determine the pH of each two-component solution....Ch. 16 - Determine the pH of each two-component solution....Ch. 16 - Write net ionic equations for the reactions that...Ch. 16 - Prob. 140ECh. 16 - The pH of a 1.00 M solution of urea, a weak...Ch. 16 - Prob. 142ECh. 16 - Lactic acid is a weak acid found in milk. Its...Ch. 16 - Prob. 144ECh. 16 - A student mistakenly calculates the pH of a 1.0107...Ch. 16 - When 2.55 g of an unknown weak acid (HA) with a...Ch. 16 - Prob. 147ECh. 16 - To what volume should you dilute 1 L of a solution...Ch. 16 - HA, a weak acid, with Ka=1.0108 , also forms the...Ch. 16 - Prob. 150ECh. 16 - Prob. 151ECh. 16 - To 1.0 L of a 0.30 M solution of HCIO2 is added...Ch. 16 - A mixture of Na2CO3 and NaHCO3 has a mass of 82.2...Ch. 16 - Prob. 154ECh. 16 - Prob. 155ECh. 16 - Prob. 156ECh. 16 - Prob. 157ECh. 16 - Prob. 158ECh. 16 - Without referring to the text, go around your...Ch. 16 - Prob. 160ECh. 16 - Prob. 161ECh. 16 - Prob. 162ECh. 16 - Prob. 163ECh. 16 - Prob. 164ECh. 16 - Identify the conjugate base in the reaction shown...Ch. 16 - Which pair is a Bronsted-Lowry conjugate acid-base...Ch. 16 - Which acid has the largest Ka: HClO2(aq),...Ch. 16 - Consider the given acid ionization constants and...Ch. 16 - What is the OH- concentration in an aqueous...Ch. 16 - An HNO3(aq) solution has a pH of 1.75. What is the...Ch. 16 - Find the pH of a 0.350 M aqueous benzoic acid...Ch. 16 - Find the pH of a 0.155 M HClO2(aq) solution. For...Ch. 16 - 9. Calculate the percent ionization of 1.45 M...Ch. 16 - Consider two aqueous solutions of nitrous acid...Ch. 16 - What is the [OH-] in a 0.200 M solution of...Ch. 16 - Which ion will be basic in aqueous solution? HSO4-...Ch. 16 - Which compound will form an acidic solution when...Ch. 16 - Find the pH of 0.175 M NaCN solution. For HCN,...Ch. 16 - What is the concentration of X2- in a 0.150 M...
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