Chemistry Principles And Practice
3rd Edition
ISBN: 9781305295803
Author: David Reger; Scott Ball; Daniel Goode
Publisher: Cengage Learning
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Chapter 4, Problem 4.29QE
An aqueous sample is known to contain either Mg2+ or Ba2+ ions. Treatment of the sample with Na2CO3 produces a precipitate, but treatment with ammonium sulfate does not. Use the solubility rules (see Table 4.1) to determine which cation is present.
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LTS
Solid:
AT=Te-Ti
Trial 1
Trial 2
Trial 3
Average
ΔΗ
Mass water, g
24.096
23.976
23.975
Moles of solid, mol
0.01763
001767
0101781
Temp. change, °C
2.9°C
11700
2.0°C
Heat of reaction, J
-292.37J -170.473
-193.26J
AH, kJ/mole
16.58K 9.647 kJ 10.85 kr
16.58K59.64701
KJ
mol
12.35k
Minimum AS,
J/mol K
41.582
mol-k
Remember: q = mCsAT (m = mass of water, Cs=4.184J/g°C) & qsin =-qrxn &
Show your calculations for:
AH in J and then in kJ/mole for Trial 1:
qa (24.0969)(4.1845/g) (-2.9°C)=-292.37J
qsin =
qrxn =
292.35 292.37J
AH in J = 292.375 0.2923kJ
0.01763m01
=1.65×107
AH in kJ/mol =
=
16.58K
0.01763mol
mol
qrx
Minimum AS in J/mol K (Hint: use the average initial temperature of the three trials, con
Kelvin.)
AS=AHIT
(1.65×10(9.64×103) + (1.0
Jimai
For the compound: C8H17NO2
Use the following information to come up with a plausible structure:
8
This compound has "carboxylic acid amide" and ether functional groups.
The peaks at 1.2ppm are two signals that are overlapping one another.
One of the two signals is a doublet that represents 6 hydrogens; the
other signal is a quartet that represents 3 hydrogens.
Vnk the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest bolling
point, choose 2 next to the substance with the next highest boiling point, and so on.
substance
C
D
chemical symbol,
chemical formula
or Lewis structure.
CH,-N-CH,
CH,
H
H 10: H
C-C-H
H H H
Cale
H 10:
H-C-C-N-CH,
Bri
CH,
boiling point
(C)
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(C) B
(Choose
Chapter 4 Solutions
Chemistry Principles And Practice
Ch. 4 - Prob. 4.1QECh. 4 - A solution is formed by mixing 1 gal ethanol with...Ch. 4 - An aqueous sample is known to contain either Sr2+...Ch. 4 - Ammonium chloride is a strong electrolyte. Draw a...Ch. 4 - Experiments show that propionic acid (CH3CH2COOH)...Ch. 4 - Describe the procedure used to make 1.250 L of...Ch. 4 - If enough Li2SO4 dissolves in water to make a 0.33...Ch. 4 - Describe how 500 mL of a 1.5 M solution of HCl...Ch. 4 - Addition of water to concentrated sulfuric acid is...Ch. 4 - Draw the flow diagram for a calculation that...
Ch. 4 - Prob. 4.11QECh. 4 - Describe in words the titration of an acid with a...Ch. 4 - Describe the use of gravimetric analysis to...Ch. 4 - Draw the contents of a beaker of water that...Ch. 4 - Prob. 4.15QECh. 4 - Prob. 4.16QECh. 4 - Prob. 4.17QECh. 4 - Prob. 4.18QECh. 4 - Write the net ionic equation for the reaction, if...Ch. 4 - Write the net ionic equation for the reaction, if...Ch. 4 - Prob. 4.21QECh. 4 - Prob. 4.22QECh. 4 - Write the overall equation (including the physical...Ch. 4 - Write the overall equation (including the physical...Ch. 4 - Write the overall equation (including the physical...Ch. 4 - Write the overall equation (including the physical...Ch. 4 - An aqueous sample is known to contain either Pb2+...Ch. 4 - An aqueous sample is known to contain either Ag+...Ch. 4 - An aqueous sample is known to contain either Mg2+...Ch. 4 - An aqueous sample is known to contain either Pb2+...Ch. 4 - In the beakers shown below, the colored spheres...Ch. 4 - In the beakers shown below, the colored spheres...Ch. 4 - Calculate the molarity of KOH in a solution...Ch. 4 - Calculate the molarity of NaCl in a solution...Ch. 4 - Calculate the molarity of AgNO3 in a solution...Ch. 4 - Calculate the molarity of NaOH in a solution...Ch. 4 - What volume of a 2.3 M HCl solution is needed to...Ch. 4 - What volume of a 5.22 M NaOH solution is needed to...Ch. 4 - What volume of a 2.11 M Li2CO3 solution is needed...Ch. 4 - What volume of a 5.00 M H2SO4 solution is needed...Ch. 4 - What is the molarity of a glucose (C6H12O6)...Ch. 4 - If you dilute 25.0 mL of 1.50 M hydrochloric acid...Ch. 4 - Prob. 4.43QECh. 4 - Prob. 4.44QECh. 4 - Prob. 4.45QECh. 4 - Prob. 4.46QECh. 4 - How many grams of AgNO3 are needed to prepare 300...Ch. 4 - What mass of oxalic acid, H2C2O4, is required to...Ch. 4 - Prob. 4.49QECh. 4 - What mass of sodium sulfate, in grams, is needed...Ch. 4 - What is the molarity of a solution of strontium...Ch. 4 - What is the molarity of a solution of sodium...Ch. 4 - What is the molarity of a solution of magnesium...Ch. 4 - If 6.73 g of Na2CO3 is dissolved in enough water...Ch. 4 - The substance KSCN is frequently used to test for...Ch. 4 - Potassium permanganate (KMnO4) solutions are used...Ch. 4 - Two liters of a 1.5 M solution of sodium hydroxide...Ch. 4 - Prob. 4.58QECh. 4 - Prob. 4.59QECh. 4 - Prob. 4.60QECh. 4 - Prob. 4.61QECh. 4 - Prob. 4.62QECh. 4 - Prob. 4.63QECh. 4 - Prob. 4.64QECh. 4 - What volume of 2.4 M HCl is needed to obtain 1.3...Ch. 4 - Prob. 4.66QECh. 4 - Prob. 4.67QECh. 4 - Prob. 4.68QECh. 4 - Prob. 4.69QECh. 4 - Prob. 4.70QECh. 4 - What volume of 0.66 M HNO3 is needed to react...Ch. 4 - What volume of 0.22 M hydrochloric acid is needed...Ch. 4 - Prob. 4.73QECh. 4 - Prob. 4.74QECh. 4 - Prob. 4.75QECh. 4 - Prob. 4.76QECh. 4 - Prob. 4.77QECh. 4 - What mass of iron (III) hydroxide precipitates on...Ch. 4 - Prob. 4.79QECh. 4 - What is the solid that precipitates, and how much...Ch. 4 - What volume of 1.212 M silver nitrate is needed to...Ch. 4 - Prob. 4.82QECh. 4 - A solid forms when excess barium chloride is added...Ch. 4 - Prob. 4.84QECh. 4 - Write the overall equation (including the physical...Ch. 4 - Write the overall equation (including the physical...Ch. 4 - What is the molar concentration of a solution of...Ch. 4 - Prob. 4.88QECh. 4 - What is the molar concentration of an HCl solution...Ch. 4 - What is the molar concentration of an H2SO4...Ch. 4 - Prob. 4.91QECh. 4 - Prob. 4.92QECh. 4 - The pungent odor of vinegar is a result of the...Ch. 4 - Prob. 4.94QECh. 4 - Oranges and grapefruits are known as citrus fruits...Ch. 4 - Prob. 4.96QECh. 4 - Prob. 4.97QECh. 4 - Prob. 4.98QECh. 4 - Prob. 4.99QECh. 4 - Prob. 4.100QECh. 4 - Prob. 4.101QECh. 4 - Prob. 4.102QECh. 4 - Prob. 4.103QECh. 4 - Prob. 4.104QECh. 4 - Prob. 4.105QECh. 4 - Prob. 4.106QECh. 4 - Prob. 4.107QECh. 4 - Prob. 4.108QECh. 4 - Prob. 4.109QECh. 4 - Prob. 4.110QECh. 4 - Prob. 4.115QECh. 4 - Prob. 4.117QECh. 4 - Prob. 4.118QECh. 4 - Prob. 4.119QECh. 4 - Prob. 4.120QECh. 4 - Prob. 4.121QECh. 4 - Prob. 4.122QECh. 4 - Prob. 4.123QE
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