Chemistry Principles And Practice
3rd Edition
ISBN: 9781305295803
Author: David Reger; Scott Ball; Daniel Goode
Publisher: Cengage Learning
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Textbook Question
Chapter 5, Problem 5.71QE
Given the thermochemical equations
find the enthalpy change for
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Reagan is doing an atomic absorption experiment that requires a set of zinc standards in the 0.4-
1.6 ppm range. A 1000 ppm Zn solution was prepared by dissolving the necessary amount of
solid Zn(NO3)2 in water. The standards can be prepared by diluting the 1000 ppm Zn solution.
Table 1 shows one possible set of serial dilutions (stepwise dilution of a solution) that Reagan
could perform to make the necessary standards. Solution A was prepared by diluting 5.00 ml of
the 1000 ppm Zn standard to 50.00 ml. Solutions C-E are called "calibration standards" because
they will be used to calibrate the atomic absorption spectrometer.
Table 1: Dilutions of Zinc Solutions
Solution
Zinc Solution
Volume
Diluted Solution
Concentration
used
volume
(ppm Zn)
(mL)
(mL)
concentration
(ppm Zn)
Solution
concentration
A
1000
5.00
50.00
1.00×10²
(ppm
Zn(NO3)2)
2.90×10²
Solution
concentration
(M Zn(NO3)2
1.53×10-3
B
Solution A 5.00
100.00
5.00
C
Solution B 5.00 50.00
0.50
7.65×10-6
D
Solution B 10.00 50.00…
None
None
Chapter 5 Solutions
Chemistry Principles And Practice
Ch. 5 - Why must the physical states of all reactants and...Ch. 5 - Why is chemical energy classified as a form of...Ch. 5 - What is the difference between the enthalpy of...Ch. 5 - Classify each process as exothermic or...Ch. 5 - Explain why the specific heat of the contents of...Ch. 5 - Prob. 5.6QECh. 5 - Define heat. What are its units? How does it...Ch. 5 - Prob. 5.8QECh. 5 - Prob. 5.9QECh. 5 - Prob. 5.10QE
Ch. 5 - Prob. 5.11QECh. 5 - Is the Sun exothermic or endothermic? Is it any...Ch. 5 - Under what circumstances is the heat of a process...Ch. 5 - Prob. 5.14QECh. 5 - Prob. 5.15QECh. 5 - Prob. 5.16QECh. 5 - Prob. 5.17QECh. 5 - Prob. 5.18QECh. 5 - Prob. 5.19QECh. 5 - Prob. 5.20QECh. 5 - Prob. 5.21QECh. 5 - Prob. 5.22QECh. 5 - Prob. 5.23QECh. 5 - Prob. 5.24QECh. 5 - Prob. 5.25QECh. 5 - Prob. 5.26QECh. 5 - Prob. 5.27QECh. 5 - Prob. 5.28QECh. 5 - Prob. 5.29QECh. 5 - Prob. 5.30QECh. 5 - Prob. 5.31QECh. 5 - A chemical reaction occurs and absorbs 64.7 cal....Ch. 5 - The enthalpy change for the following reaction is...Ch. 5 - Prob. 5.34QECh. 5 - The thermochemical equation for the burning of...Ch. 5 - When lightning strikes, the energy can force...Ch. 5 - One step in the manufacturing of sulfuric acid is...Ch. 5 - If nitric acid were sufficiently heated, it can be...Ch. 5 - Prob. 5.39QECh. 5 - Prob. 5.40QECh. 5 - Prob. 5.41QECh. 5 - The combustion of 1.00 mol liquid methyl alcohol...Ch. 5 - Another reaction that is used to propel rockets is...Ch. 5 - Prob. 5.44QECh. 5 - Prob. 5.45QECh. 5 - Prob. 5.46QECh. 5 - Prob. 5.47QECh. 5 - Prob. 5.48QECh. 5 - Prob. 5.49QECh. 5 - Prob. 5.50QECh. 5 - The enthalpy change when 1 mol methane (CH4) is...Ch. 5 - Prob. 5.52QECh. 5 - Prob. 5.53QECh. 5 - How much energy is required to raise the...Ch. 5 - How much heat, in kilojoules, must be removed to...Ch. 5 - Prob. 5.56QECh. 5 - Prob. 5.57QECh. 5 - Prob. 5.58QECh. 5 - Prob. 5.59QECh. 5 - Prob. 5.60QECh. 5 - When 7.11 g NH4NO3 is added to 100 mL water, the...Ch. 5 - A 50-mL solution of a dilute AgNO3 solution is...Ch. 5 - A 0.470-g sample of magnesium reacts with 200 g...Ch. 5 - Dissolving 6.00 g CaCl2 in 300 mL of water causes...Ch. 5 - Draw an energy-level diagram (e.g., see Figure...Ch. 5 - Prob. 5.66QECh. 5 - Prob. 5.67QECh. 5 - Prob. 5.68QECh. 5 - Calculate H for the reaction...Ch. 5 - Prob. 5.70QECh. 5 - Given the thermochemical equations...Ch. 5 - In the process of isolating iron from its ores,...Ch. 5 - Prob. 5.73QECh. 5 - Prob. 5.75QECh. 5 - Prob. 5.77QECh. 5 - Prob. 5.78QECh. 5 - Prob. 5.79QECh. 5 - Prob. 5.80QECh. 5 - Prob. 5.81QECh. 5 - Prob. 5.82QECh. 5 - Calculate H when a 38-g sample of glucose,...Ch. 5 - Prob. 5.84QECh. 5 - The octane number of gasoline is based on a...Ch. 5 - One of the components of jet engine fuel is...Ch. 5 - Prob. 5.87QECh. 5 - Prob. 5.88QECh. 5 - When a 2.30-g sample of magnesium dissolves in...Ch. 5 - Prob. 5.90QECh. 5 - Prob. 5.91QECh. 5 - What mass of acetylene, C2H2(g), must be burned to...Ch. 5 - It takes 677 J of heat to increase the temperature...Ch. 5 - Prob. 5.94QECh. 5 - Prob. 5.96QECh. 5 - The enthalpy of combustion of liquid n-hexane,...Ch. 5 - What is Hrxn for reaction of iron(III) oxide and...Ch. 5 - Prob. 5.99QECh. 5 - Prob. 5.100QECh. 5 - In the 1880s, Frederick Trouton noted that the...Ch. 5 - Prob. 5.102QECh. 5 - Prob. 5.103QECh. 5 - Prob. 5.104QECh. 5 - Prob. 5.105QECh. 5 - A compound is 82.7% carbon and 17.3% hydrogen, and...Ch. 5 - Prob. 5.107QECh. 5 - Prob. 5.108QE
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