Chemistry: The Central Science (14th Edition)
14th Edition
ISBN: 9780134414232
Author: Theodore E. Brown, H. Eugene LeMay, Bruce E. Bursten, Catherine Murphy, Patrick Woodward, Matthew E. Stoltzfus
Publisher: PEARSON
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Question
Chapter 20, Problem 12E
(a)
Interpretation Introduction
To determine: The oxidation number of
(b)
Interpretation Introduction
To determine: The electrolyte used in the given cell.
(c)
Interpretation Introduction
To determine: The half- reaction occurring at anode in the given electrolytic cell.
(d)
Interpretation Introduction
To determine: The half- reaction occurring at cathode in the given electrolytic cell.
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N-nitrosodimethylamine (NDMA) is a suspected carcinogen that can form via reactions
between dimethylamine (DMA) and monochloramine (NH2Cl). The relevant elementary
reactions and the corresponding rate constants are as shown below.
Reaction
Rate constant (M¹s¹)
DMA + NH2Cl = DMCA + NH3
k =1.4×10-1, kr = 5.83×10-3
1.28×10-3
DMA + NH2Cl → UDMH
UDMH + NH2Cl → NDMA
->
1.11×10-1
If the initial concentrations of DMA and NH2Cl are given, you should be able to predict the
concentrations of all species at any given reaction time. Please write down the rate equations
for DMA, NH2C1, DMCA, UDMH and NDMA.
You wish to add enough NaOCl (sodium hypochlorite) to a 150 m³ swimming pool to provide
a dose of 5.0 mg/L TOTOCI as Cl2.
(a) How much NaOCI (kg) should you add? (Note: the equivalent weight of NaOCl is
based on the reaction: NaOCl + 2H + 2 e→CI + Na +H₂O.) (10 pts) (atomic
weight: Na 23, O 16, C1 35.5)
(b) The pH in the pool after the NaOCl addition is 8.67. To improve disinfection, you
want at least 90% of the TOTOCI to be in the form of HOCI (pKa 7.53). Assuming
that HOCI/OCI is the only weak acid/base group in solution, what volume (L) of
10 N HCl must be added to achieve the goal? (15 pts)
Note that part a) is a bonus question for undergraduate students. If you decide not to work on
this part of the question, you many assume TOTOCI = 7×10-5 M for part b).
Part A
2K(s)+Cl2(g)+2KCI(s)
Express your answer in grams to three significant figures.
Part B
2K(s)+Br2(1)→2KBr(s)
Express your answer in grams to three significant figures.
Part C
4Cr(s)+302(g)+2Cr2O3(s)
Express your answer in grams to three significant figures.
Part D
2Sr(s)+O2(g) 2SrO(s)
Express your answer in grams to three significant figures.
Thank you!
Chapter 20 Solutions
Chemistry: The Central Science (14th Edition)
Ch. 20.1 - What is the reducing agent in the following...Ch. 20.1 - Prob. 20.1.2PECh. 20.2 - Prob. 20.2.1PECh. 20.2 - Prob. 20.2.2PECh. 20.2 - Prob. 20.3.1PECh. 20.2 - Prob. 20.3.2PECh. 20.3 - Prob. 20.4.1PECh. 20.3 - Prob. 20.4.2PECh. 20.4 - Prob. 20.5.1PECh. 20.4 - The standard cell potential is 1.46 V for a...
Ch. 20.4 - Prob. 20.6.1PECh. 20.4 - Prob. 20.6.2PECh. 20.4 - Prob. 20.7.1PECh. 20.4 - Prob. 20.7.2PECh. 20.4 - Prob. 20.8.1PECh. 20.4 - Practice Exercise 2
Using Table 20.1, rank...Ch. 20.5 - Practice Exercise 1
Which of the following...Ch. 20.5 - Prob. 20.9.2PECh. 20.5 - Prob. 20.10.1PECh. 20.5 - Prob. 20.10.2PECh. 20.6 - Prob. 20.11.1PECh. 20.6 - Prob. 20.11.2PECh. 20.6 - Prob. 20.12.1PECh. 20.6 - Prob. 20.12.2PECh. 20.6 - Prob. 20.13.1PECh. 20.6 - Prob. 20.13.2PECh. 20.9 - Prob. 20.14.1PECh. 20.9 - Prob. 20.14.2PECh. 20 - Prob. 1DECh. 20 - Prob. 1ECh. 20 - 20.2 You may have heard that “antioxidants” are...Ch. 20 - Prob. 3ECh. 20 - Prob. 4ECh. 20 - Prob. 5ECh. 20 - Prob. 6ECh. 20 - 20.7 Consider a redox reaction for which Eo is a...Ch. 20 - Prob. 8ECh. 20 - Prob. 9ECh. 20 - Prob. 10ECh. 20 - Prob. 11ECh. 20 - Prob. 12ECh. 20 - 20.13
What is meant by the term oxidation?
On...Ch. 20 - Prob. 14ECh. 20 - Prob. 15ECh. 20 - Prob. 16ECh. 20 - Prob. 17ECh. 20 - Prob. 18ECh. 20 - Prob. 19ECh. 20 - Prob. 20ECh. 20 - Prob. 21ECh. 20 - Prob. 22ECh. 20 - Complete and balance the following half-reactions....Ch. 20 - Complete and balance the following half-reaction,...Ch. 20 - Complete and balance the following equations, and...Ch. 20 - Complete and balance the following equations, and...Ch. 20 - Prob. 27ECh. 20 - Prob. 28ECh. 20 - Prob. 29ECh. 20 - Prob. 30ECh. 20 - Prob. 31ECh. 20 - Prob. 32ECh. 20 - Prob. 33ECh. 20 - Prob. 34ECh. 20 - Prob. 35ECh. 20 - Prob. 36ECh. 20 - Prob. 37ECh. 20 - Prob. 38ECh. 20 - Prob. 39ECh. 20 - Prob. 40ECh. 20 - Prob. 41ECh. 20 - Prob. 42ECh. 20 - Prob. 43ECh. 20 - Prob. 44ECh. 20 - Prob. 45ECh. 20 - Prob. 46ECh. 20 - Assuming standard conditions, arrange the...Ch. 20 - Prob. 48ECh. 20 - Prob. 49ECh. 20 - Prob. 50ECh. 20 - Prob. 51ECh. 20 - For each of the following reactions, write a...Ch. 20 - Prob. 53ECh. 20 - Prob. 54ECh. 20 - Prob. 55ECh. 20 - Prob. 56ECh. 20 - A cell has a standard cell potential of +0.177 V...Ch. 20 - Prob. 58ECh. 20 - Prob. 59ECh. 20 - Prob. 60ECh. 20 - Prob. 61ECh. 20 - Prob. 62ECh. 20 - Prob. 63ECh. 20 - A voltaic cell utilizes the following reaction:...Ch. 20 - Prob. 65ECh. 20 - Prob. 66ECh. 20 - Prob. 67ECh. 20 - Prob. 68ECh. 20 - Prob. 69ECh. 20 - Prob. 70ECh. 20 - Prob. 71ECh. 20 - 20. 72 A voltaic cell is constructed that is based...Ch. 20 - Prob. 73ECh. 20 - Prob. 74ECh. 20 - Prob. 75ECh. 20 - Prob. 76ECh. 20 - Prob. 77ECh. 20 - In some applications nickel-cadmium batteries have...Ch. 20 - Prob. 79ECh. 20 - Prob. 80ECh. 20 - Prob. 81ECh. 20 - Prob. 82ECh. 20 - Prob. 83ECh. 20 - Prob. 84ECh. 20 - Prob. 85ECh. 20 - Prob. 86ECh. 20 - Prob. 87ECh. 20 - Prob. 88ECh. 20 - Prob. 89ECh. 20 - Prob. 90ECh. 20 - Prob. 91ECh. 20 - Metallic magnesium can be made by the electrolysis...Ch. 20 - 20.93
Calculate the mass of Li formed by...Ch. 20 - Prob. 94ECh. 20 - Prob. 95ECh. 20 - Prob. 96ECh. 20 - Prob. 97AECh. 20 - Prob. 98AECh. 20 - Prob. 99AECh. 20 - [20.100] Gold exists in two common positive...Ch. 20 - Prob. 101AECh. 20 - Prob. 102AECh. 20 - Prob. 103AECh. 20 - Prob. 104AECh. 20 - Prob. 105AECh. 20 - Prob. 106AECh. 20 - Prob. 107AECh. 20 - Prob. 108AECh. 20 - Prob. 109AECh. 20 - Prob. 110AECh. 20 - Prob. 111IECh. 20 - Prob. 112IECh. 20 - Prob. 113IECh. 20 - Prob. 114IECh. 20 - Prob. 115IECh. 20 - Prob. 116IECh. 20 - Prob. 117IECh. 20 - Prob. 118IECh. 20 - Prob. 119IE
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