Chemistry for Engineering Students
4th Edition
ISBN: 9780357026991
Author: Brown
Publisher: CENGAGE Learning Custom Publishing
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Chapter 13, Problem 4CO
Interpretation Introduction
Interpretation:
The differences between galvanic cell and electrolytic cells should be explained.
Concept Introduction:
- Galvanic cell and electrolytic cell are types of
electrochemical cells. - An electrochemical cell is a device which can either generate electrical energy using a
chemical reaction or can facilitate a chemical reaction using the electrical energy. - An electrochemical cell consists of two half cells: anode and cathode.
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3) Propagation of uncertainty. Every measurement has uncertainty. In this problem, we'll
evaluate the uncertainty in every step of a titration of potassium hydrogen phthalate (a
common acid used in titrations, abbreviated KHP, formula CsH5KO4) with NaOH of an
unknown concentration.
The calculation that ultimately needs to be carried out is:
concentration NaOH
1000 x mass KHP × purity KHP
molar mass KHP x volume NaOH
Measurements:
a) You use a balance to weigh 0.3992 g of KHP. The uncertainty is ±0.15 mg (0.00015
g).
b) You use a buret to slowly add NaOH to the KHP until it reaches the endpoint. It takes
18.73 mL of NaOH. The uncertainty of the burst is 0.03 mL..
c) The manufacturer states the purity of KHP is 100%±0.05%.
d) Even though we don't think much about them, molar masses have uncertainty as well.
The uncertainty comes from the distribution of isotopes, rather than random
measurement error. The uncertainty in the elements composing KHP are:
a. Carbon:
b. Hydrogen:
±0.0008…
Don't used hand raiting and don't used Ai solution
How would you use infrared spectroscopy to distinguish between the following pairs of constitutional isomers?
(a)
CH3C=CCH3
||
and
CH3CH2C=CH
(b)
CH3CCH=CHCH3
and
CH3CCH2CH=CH2
Problem 12-41
The mass spectrum (a) and the infrared spectrum (b) of an unknown hydrocarbon are shown. Propose as many
structures as you can.
(a)
100
Relative abundance (%)
80
60
60
40
200
20
(b)
100
Transmittance (%)
10
20
20
80-
60-
40-
20
40
60
80
100
120
140
m/z
500
4000 3500
3000
2500
2000
1500
Wavenumber (cm-1)
1000
Chapter 13 Solutions
Chemistry for Engineering Students
Ch. 13 - Prob. 1COCh. 13 - Prob. 2COCh. 13 - • write and balance half-reactions for simple...Ch. 13 - Prob. 4COCh. 13 - Prob. 5COCh. 13 - • use standard reduction potentials to predict the...Ch. 13 - • calculate the amount of metal plated, the amount...Ch. 13 - Prob. 8COCh. 13 - Prob. 9COCh. 13 - Prob. 10CO
Ch. 13 - Prob. 13.1PAECh. 13 - Prob. 13.2PAECh. 13 - Prob. 13.3PAECh. 13 - Prob. 13.4PAECh. 13 - For the following oxidationreduction reactions,...Ch. 13 - Which half-reaction takes place at the anode of an...Ch. 13 - If a salt bridge contains KNO3 as its electrolyte,...Ch. 13 - If a salt bridge contains KNO3 as its electrolyte,...Ch. 13 - The following oxidationreduction reactions are...Ch. 13 - Write a balanced chemical equation for the overall...Ch. 13 - For the reactions in parts (a) and (b) in the...Ch. 13 - Explain why the terms cell potential and...Ch. 13 - How does galvanic corrosion differ from uniform...Ch. 13 - Prob. 13.14PAECh. 13 - A student who has mercury amalgam fillings in some...Ch. 13 - Based on the cell potential measured for the cells...Ch. 13 - Prob. 13.17PAECh. 13 - Four voltaic cells are set up. In each, one...Ch. 13 - In tables of standard reduction potentials that...Ch. 13 - In the table of standard reduction potentials,...Ch. 13 - Using values from the table of standard reduction...Ch. 13 - Using values from the table of standard reduction...Ch. 13 - One half-cell in a voltaic cell is constructed...Ch. 13 - Four metals, A, B, C, and D, exhibit the following...Ch. 13 - Use the Nernst equation to calculate the cell...Ch. 13 - One half-cell in a voltaic cell is constructed...Ch. 13 - We noted that a tin-plated steel can corrodes more...Ch. 13 - The following half-cells are available: Ag(s);...Ch. 13 - Prob. 13.29PAECh. 13 - Prob. 13.30PAECh. 13 - In May 2000, a concrete pedestrian walkway...Ch. 13 - Prob. 13.32PAECh. 13 - Calculate the standard free energy change for the...Ch. 13 - Suppose that you cannot find a table of standard...Ch. 13 - Prob. 13.35PAECh. 13 - Which of the following reactions is (are)...Ch. 13 - Consult a table of standard reduction potentials...Ch. 13 - The equilibrium constant for a reaction is 31015...Ch. 13 - Some calculators cannot display results of an...Ch. 13 - Calculate the equilibrium constant for the...Ch. 13 - Use the standard reduction potentials for the...Ch. 13 - Hydrogen peroxide is often stored in the...Ch. 13 - Calculate the equilibrium constant for the redox...Ch. 13 - An engineer is assigned to design an...Ch. 13 - A magnesium bar with a mass of 6.0 kg is attached...Ch. 13 - Prob. 13.46PAECh. 13 - Prob. 13.47PAECh. 13 - Prob. 13.48PAECh. 13 - Prob. 13.49PAECh. 13 - If you put a 9-volt battery in a smoke detector in...Ch. 13 - If alkaline batteries were not alkaline but rather...Ch. 13 - What would happen to the voltage of an alkaline...Ch. 13 - What product forms from the lead components of a...Ch. 13 - Prob. 13.54PAECh. 13 - Prob. 13.55PAECh. 13 - Assume the specifications of a Ni-Cd voltaic cell...Ch. 13 - Prob. 13.57PAECh. 13 - What is the difference between active and passive...Ch. 13 - Prob. 13.59PAECh. 13 - Prob. 13.60PAECh. 13 - In an electroplating operation, the cell potential...Ch. 13 - Prob. 13.62PAECh. 13 - Prob. 13.63PAECh. 13 - Prob. 13.64PAECh. 13 - Use the Internet to find electroplating companies...Ch. 13 - Prob. 13.66PAECh. 13 - If a current of 15 A is run through an...Ch. 13 - Suppose somebody in a laboratory doesn't quite...Ch. 13 - If a barrel plating run uses 200.0 A for exactly 6...Ch. 13 - An electrical engineer is analyzing an...Ch. 13 - In a copper plating experiment in which copper...Ch. 13 - A metallurgist wants to gold-plate a thin sheet...Ch. 13 - Tin-plated steel is used for "tin" cans. Suppose...Ch. 13 - An electrolysis cell for aluminum production...Ch. 13 - If a plating line that deposits nickel (from NiCl2...Ch. 13 - Prob. 13.76PAECh. 13 - Prob. 13.77PAECh. 13 - A small part with a surface area of 2.62 cm2 is...Ch. 13 - An engineer is designing a mirror for an optical...Ch. 13 - Prob. 13.80PAECh. 13 - Prob. 13.81PAECh. 13 - What characteristic of lithium ions makes it...Ch. 13 - Looking at Figure 13.23, describe how the...Ch. 13 - Prob. 13.84PAECh. 13 - What is the role of a salt bridge in the...Ch. 13 - Prob. 13.86PAECh. 13 - If the SHE was assigned a value of 3.00 V rather...Ch. 13 - Prob. 13.88PAECh. 13 - Prob. 13.89PAECh. 13 - A chemical engineering student is studying the...Ch. 13 - Prob. 13.91PAECh. 13 - If a logarithmic scale had not been used for the...Ch. 13 - Battery manufacturers often assess batteries in...Ch. 13 - Prob. 13.94PAECh. 13 - Prob. 13.95PAECh. 13 - Prob. 13.96PAECh. 13 - As the voltaic cell shown here runs, the blue...Ch. 13 - Prob. 13.98PAECh. 13 - For a voltage-sensitive application, you are...Ch. 13 - Prob. 13.100PAECh. 13 - Prob. 13.101PAECh. 13 - Prob. 13.102PAECh. 13 - Prob. 13.103PAECh. 13 - 13.104 (a) What happens when a current is passed...Ch. 13 - A current is passed through a solution of...Ch. 13 - 13.106 Hydrazine, N2H4 , has been proposed as the...Ch. 13 - Prob. 13.107PAE
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