Bundle: Chemistry: The Molecular Science, 5th, Loose-Leaf + OWLv2 with Quick Prep 24-Months Printed Access Card
5th Edition
ISBN: 9781305367487
Author: John W. Moore, Conrad L. Stanitski
Publisher: Cengage Learning
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Question
Chapter 3, Problem 95QRT
Interpretation Introduction
Interpretation:
From the given information, the percentage mass of oxalic acid in the mixture has to be calculated.
Concept introduction:
The percentage mass can be calculated by using following formula
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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 3 Solutions
Bundle: Chemistry: The Molecular Science, 5th, Loose-Leaf + OWLv2 with Quick Prep 24-Months Printed Access Card
Ch. 3.1 - When washing soda, Na2CO3, reacts with sulfuric...Ch. 3.2 - When sprayed into the flame of a torch, powdered...Ch. 3.2 - Prob. 3.1PSPCh. 3.2 - Prob. 3.2PSPCh. 3.3 - Prob. 3.3PSPCh. 3.3 - Prob. 3.4PSPCh. 3.3 - Prob. 3.5PSPCh. 3.3 - Prob. 3.6PSPCh. 3.3 - Prob. 3.3CECh. 3.4 - Phosphoric acid, H3PO4, has three protons that can...
Ch. 3.4 - Prob. 3.5CECh. 3.4 - Look back through the discussion of electrolytes...Ch. 3.4 - Prob. 3.8PSPCh. 3.4 - Prob. 3.9PSPCh. 3.4 - Write a balanced equation for the reaction of...Ch. 3.4 - Prob. 3.6ECh. 3.4 - Prob. 3.7ECh. 3.4 - Prob. 3.8ECh. 3.4 - Prob. 3.9CECh. 3.4 - Prob. 3.10CECh. 3.5 - Prob. 3.11CECh. 3.5 - Prob. 3.12CECh. 3.5 - Prob. 3.13ECh. 3.5 - Prob. 3.11PSPCh. 3.5 - Prob. 3.12PSPCh. 3.5 - Prob. 3.14CECh. 3.6 - Prob. 3.15CECh. 3.6 - Prob. 3.16ECh. 3.6 - Prob. 3.13PSPCh. 3.6 - Prob. 3.17ECh. 3.6 - Prob. 3.14PSPCh. 3.7 - Prob. 3.15PSPCh. 3.7 - Using the same reaction, calculate the mass of...Ch. 3.7 - At high temperatures, silicon dioxide reacts with...Ch. 3.7 - Urea is used as a fertilizer because it can react...Ch. 3.8 - Assume the methanol synthesis has an 85.0% yield...Ch. 3.8 - Prob. 3.19PSPCh. 3.8 - Prob. 3.19ECh. 3.8 - Prob. 3.20ECh. 3.9 - Phenol is a compound of carbon, hydrogen, and...Ch. 3.9 - Calcium carbonate forms carbon dioxide and calcium...Ch. 3.10 - Prob. 3.20PSPCh. 3.10 - Prob. 3.23ECh. 3.10 - Prob. 3.24ECh. 3.10 - Prob. 3.25CECh. 3.10 - Describe how you would prepare each solution.
1.00...Ch. 3.10 - Prob. 3.26ECh. 3.10 - Prob. 3.22PSPCh. 3.10 - Prob. 3.27CECh. 3.11 - Prob. 3.23PSPCh. 3.11 - Prob. 3.24PSPCh. 3.11 - Sodium chloride is used in intravenous solutions...Ch. 3.12 - Show that the reaction of KMnO4 with H2O2 is a...Ch. 3.12 - Prob. 3.25PSPCh. 3 - Aqueous solutions of ammonium sulfide and...Ch. 3 - In a blast furnace at high temperature, iron(III)...Ch. 3 - What information does a balanced chemical equation...Ch. 3 - Prob. 2QRTCh. 3 - Prob. 3QRTCh. 3 - Prob. 4QRTCh. 3 - Prob. 5QRTCh. 3 - Prob. 6QRTCh. 3 - When asked, “What is the limiting reactant?” you...Ch. 3 - Prob. 8QRTCh. 3 - Prob. 9QRTCh. 3 - For this reaction, fill in the table with the...Ch. 3 - Prob. 11QRTCh. 3 - Prob. 12QRTCh. 3 - This diagram shows A (blue spheres) reacting with...Ch. 3 - Prob. 14QRTCh. 3 - Prob. 15QRTCh. 3 - Prob. 16QRTCh. 3 - Prob. 17QRTCh. 3 - Prob. 18QRTCh. 3 - Prob. 19QRTCh. 3 - Balance these equations. (a) UO2(s) + HF() UF4(s)...Ch. 3 - Prob. 21QRTCh. 3 - Prob. 22QRTCh. 3 - Prob. 23QRTCh. 3 - Balance these combustion reactions. (a) C6H12O6 +...Ch. 3 - Prob. 25QRTCh. 3 - Prob. 26QRTCh. 3 - Prob. 27QRTCh. 3 - Which substance conducts electricity when...Ch. 3 - Prob. 29QRTCh. 3 - Predict whether each compound is soluble in water....Ch. 3 - Prob. 31QRTCh. 3 - Which drawing is the best nanoscale representation...Ch. 3 - If aqueous solutions of potassium carbonate and...Ch. 3 - If aqueous solutions of potassium sulfide and...Ch. 3 - Prob. 35QRTCh. 3 - Prob. 36QRTCh. 3 - Prob. 37QRTCh. 3 - Prob. 38QRTCh. 3 - Prob. 39QRTCh. 3 - Prob. 40QRTCh. 3 - Prob. 41QRTCh. 3 - Prob. 42QRTCh. 3 - Prob. 43QRTCh. 3 - Prob. 44QRTCh. 3 - Prob. 45QRTCh. 3 - Prob. 46QRTCh. 3 - Prob. 47QRTCh. 3 - Prob. 48QRTCh. 3 - Prob. 49QRTCh. 3 - Prob. 50QRTCh. 3 - Prob. 51QRTCh. 3 - Prob. 52QRTCh. 3 - Prob. 53QRTCh. 3 - Prob. 54QRTCh. 3 - Prob. 55QRTCh. 3 - Prob. 56QRTCh. 3 - Prob. 57QRTCh. 3 - Prob. 58QRTCh. 3 - Nitrogen monoxide is oxidized in air to give brown...Ch. 3 - Prob. 60QRTCh. 3 - The final step in the manufacture of platinum...Ch. 3 - Disulfur dichloride, S2Cl2, is used to vulcanize...Ch. 3 - Prob. 63QRTCh. 3 - Prob. 64QRTCh. 3 - Prob. 65QRTCh. 3 - Prob. 66QRTCh. 3 - Prob. 67QRTCh. 3 - Cisplatin, Pt(NH3)2Cl2, a drug used in the...Ch. 3 - Aluminum chloride, Al2Cl6, is an inexpensive...Ch. 3 - Prob. 70QRTCh. 3 - Prob. 71QRTCh. 3 - Prob. 72QRTCh. 3 - Prob. 73QRTCh. 3 - Quicklime, CaO, is formed when calcium hydroxide...Ch. 3 - Prob. 75QRTCh. 3 - Disulfur dichloride, which has a revolting smell,...Ch. 3 - Prob. 77QRTCh. 3 - Prob. 78QRTCh. 3 - Quinone, which is used in the dye industry and in...Ch. 3 - l-Dopa is a drug used for the treatment of...Ch. 3 - Write the balanced chemical equation for the...Ch. 3 - Prob. 82QRTCh. 3 - Prob. 83QRTCh. 3 - Prob. 84QRTCh. 3 - Prob. 85QRTCh. 3 - Prob. 86QRTCh. 3 - You need 300. mL of 0.500-M K2Cr2O7. Which method...Ch. 3 - You need to make a 0.300-M solution of NiSO4(aq)....Ch. 3 - You wish to make a 0.200-M solution of CuSO4(aq)....Ch. 3 - Prob. 90QRTCh. 3 - Prob. 91QRTCh. 3 - You mix 25.0 mL of 0.234-M FeCl3 solution with...Ch. 3 - A soft drink contains an unknown mass of citric...Ch. 3 - Prob. 94QRTCh. 3 - Prob. 95QRTCh. 3 - Potassium hydrogen phthalate, KHC8H4O4, is used to...Ch. 3 - Prob. 97QRTCh. 3 - Prob. 98QRTCh. 3 - Prob. 99QRTCh. 3 - Prob. 100QRTCh. 3 - Boron forms an extensive series of compounds with...Ch. 3 - Prob. 102QRTCh. 3 - Prob. 103QRTCh. 3 - Prob. 104QRTCh. 3 - Prob. 105QRTCh. 3 - Azurite is a copper-containing mineral that often...Ch. 3 - Prob. 107QRTCh. 3 - Prob. 108QRTCh. 3 - Vitamin C is ascorbic acid, HC6H7O6, which can be...Ch. 3 - Prob. 110QRTCh. 3 - Prob. 111QRTCh. 3 - Prob. 112QRTCh. 3 - Prob. 113QRTCh. 3 - Prob. 114QRTCh. 3 - Prob. 115QRTCh. 3 - Prob. 116QRTCh. 3 - Prob. 117QRTCh. 3 - Prob. 118QRTCh. 3 - Prob. 119QRTCh. 3 - Prob. 120QRTCh. 3 - Ammonia can be formed by a direct reaction of...Ch. 3 - Carbon monoxide burns readily in oxygen to form...Ch. 3 - Prob. 123QRTCh. 3 - Write a balanced chemical equation that represents...Ch. 3 - A student set up an experiment for six different...Ch. 3 - A weighed sample of a metal is added to liquid...Ch. 3 - Prob. 127QRTCh. 3 - Prob. 128QRTCh. 3 - Each box represents a tiny volume in an aqueous...Ch. 3 - Consider the chemical reaction 2 S + 3 O2 → 2 SO3....Ch. 3 - Prob. 131QRTCh. 3 - Prob. 132QRTCh. 3 - Prob. 133QRTCh. 3 - Prob. 134QRTCh. 3 - Prob. 135QRTCh. 3 - Prob. 136QRTCh. 3 - Prob. 137QRTCh. 3 - Prob. 138QRTCh. 3 - Prob. 139QRTCh. 3 - Prob. 140QRTCh. 3 - Prob. 141QRTCh. 3 - Prob. 142QRTCh. 3 - In a reaction, 1.2 g element A reacts with exactly...Ch. 3 - Prob. 144QRTCh. 3 - When solutions of silver nitrate and sodium...Ch. 3 - Nickel metal reacts with aqueous silver nitrate in...Ch. 3 - Prob. 147QRTCh. 3 - Prob. 148QRTCh. 3 - Prob. 149QRTCh. 3 - Prob. 150QRTCh. 3 - A mountain lake that is 4.0 km × 6.0 km with an...Ch. 3 - Prob. 152QRTCh. 3 - Prob. 153QRTCh. 3 - Prob. 154QRTCh. 3 - Prob. 155QRTCh. 3 - Ethanol, C2H5OH, is a gasoline additive that can...Ch. 3 - Prob. 157QRTCh. 3 - Prob. 3.ACPCh. 3 - Prob. 3.BCPCh. 3 - Prob. 3.DCPCh. 3 - Prob. 3.ECPCh. 3 - Prob. 3.FCPCh. 3 - Prob. 3.GCP
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