Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN: 9781938168390
Author: Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
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Chapter 17, Problem 52E
An irregularly shaped metal part made from a particular alloy was galvanized with zinc using a Zn(NO3)2 solution. When a current of 2.599 A was used, it took exactly 1 hour to deposit a 0.01123-mm layer of zinc on the part. What was the total surface area of the part? The density of zinc is 7.140 g/cm3. Assume the efficiency is 100%.
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(a) The following synthesis of the molecule shown in the circle has a major problem. What is this problem? (2
pts)
1) HBr
(no peroxides)
2) H-
NaNH2
Br
3) NaNH,
4) CH3Br
5) H2, Pd
(b) Starting with the molecule shown below and any other materials with two carbons or less, write out an
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product in all the steps in your synthesis. (5 pts)
2024 Fall Term (1) Organic Chemistry 1 (Lec)
CHEM 22204 02[6386] (Hunter College)
(c) Using the same starting material as in part (b) and any other materials win two carpons or less, write out
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alt
ons for
Free Response Questions
FRQ 1:
0/5
To spectrophotometrically determine the mass percent of cobalt in an ore containing cobalt and
some inert materials, solutions with known [Co?) are prepared and absorbance of each of the
solutions is measured at the wavelength of optimum absorbance. The data are used to create a
calibration plot, shown below.
0.90-
0.80-
0.70
0.60
0.50
0.40-
0.30
0.20-
0.10-
0.00-
0.005
0.010
Concentration (M)
0.015
A 0.630 g sample of the ore is completely dissolved in concentrated HNO3(aq). The mixture is diluted
with water to a final volume of 50.00 ml. Assume that all the cobalt in the ore sample is converted to
Co2+(aq).
a. What is the [Co2] in the solution if the absorbance of a sample of the solution is 0.74?
13
✗
b. Calculate the number of moles of Co2+(aq) in the 50.00 mL solution.
0.008 mols Co
Please correct answer and don't used hand raiting
Chapter 17 Solutions
Chemistry by OpenStax (2015-05-04)
Ch. 17 - If a 2.5 A current is run through a circuit for 35...Ch. 17 - For the scenario in the previous question, how...Ch. 17 - For each of the following balanced half-reactions,...Ch. 17 - For each of the following balanced half-reactions,...Ch. 17 - Given the following pairs of balanced...Ch. 17 - Balance the following in acidic solution: (a)...Ch. 17 - Identify the species that undergoes oxidation, the...Ch. 17 - Balance the following in acidic solution: (a)...Ch. 17 - Identify the species that was oxidized, the...Ch. 17 - Why is it not possible for hydroxide ion (OH-) to...
Ch. 17 - Why is it not possible for hydrogen ion (H+) to...Ch. 17 - Why must the charge balance in oxidation-reduction...Ch. 17 - Write the following balanced reactions using cell...Ch. 17 - Given the following cell notations, determine the...Ch. 17 - For the cell notations in the previous problem,...Ch. 17 - Balance the following reactions and write the...Ch. 17 - Identify the species oxidized species reduced, and...Ch. 17 - From the information provided, use cell notation...Ch. 17 - Why is a salt bridge necessary in galvanic cells...Ch. 17 - An active (metal) electrode was found to gain mass...Ch. 17 - An active (metal) electrode was found to lose mass...Ch. 17 - The mass of three different metal electrodes, each...Ch. 17 - For each reaction listed, determine its standard...Ch. 17 - For each reaction listed, determine its standard...Ch. 17 - Determine the overall reaction and its standard...Ch. 17 - Determine the overall reaction and its standard...Ch. 17 - Determine the overall reaction and its standard...Ch. 17 - Determine the overall reaction and its standard...Ch. 17 - For the standard cell potentials given here,...Ch. 17 - For the ?G values given here, determine the...Ch. 17 - Determine the standard cell potential and the cell...Ch. 17 - Determine G and G for each of the reactions in...Ch. 17 - Use the data in Appendix L to determine the...Ch. 17 - What are the desirable qualities of an electric...Ch. 17 - List some things that are typically considered...Ch. 17 - Consider a battery made from one half-cell that...Ch. 17 - Consider a battery with the overall reaction:...Ch. 17 - An inventor proposes using a SHE (standard...Ch. 17 - Why do batteries go dead, but fuel cells do not?Ch. 17 - Explain what happens to battery voltage as a...Ch. 17 - Using the information thus far in this chapter,...Ch. 17 - Which member of each pair of metals is more likely...Ch. 17 - Consider the following metals: Ag, Au, Mg, Ni, and...Ch. 17 - Aluminum (E Al 3+/Al=2.07V) is more easily...Ch. 17 - If a sample of iron and a sample of zinc come into...Ch. 17 - Suppose you have three different metals. A, B, and...Ch. 17 - Why would a sacrificial anode made of lithium...Ch. 17 - Identify the reaction at the anode, reaction at...Ch. 17 - What mass of each product is produced in each of...Ch. 17 - How long would it take to reduce 1 mole of each of...Ch. 17 - A current of 2.345 A passes through the cell shown...Ch. 17 - An irregularly shaped metal part made from a...
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