Chemistry In Context
9th Edition
ISBN: 9781259638145
Author: Fahlman, Bradley D., Purvis-roberts, Kathleen, Kirk, John S., Bentley, Anne K., Daubenmire, Patrick L., ELLIS, Jamie P., Mury, Michael T., American Chemical Society
Publisher: Mcgraw-hill Education,
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 7.4, Problem 7.6YT
Scientific Practices The Shift from Ni─Cd to NiMH
Look up the reactions occurring in nickel–metal hydride (NiMH) batteries, and compare them to those presented for Ni─Cd batteries (Equations 7.9 and 7.10). Why have NiMH batteries supplanted Ni─Cd batteries for consumer applications?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
When a solution of NaI in water was electrolyzed with graphite electrodes, a gas was evolved at the cathode and a yellow-brown color was observed around the anode. The solution became basic. Which one of statements (a) - (d) is not correct? If all are correct, select option (e). Please see the data page for relevant electrode potentials for the half reactions.a) OH- ions were formed at the cathode.b) I- ions were oxidizedc) The gas, which was evolved, was O2.d) Water was reducede) Statements (a) - (d) are all correct
In the electrolysis of water, how long will it take to produce 75.00 L of H₂ at 1.0 atm and 273 K using an electrolytic cell through which the current is
169.0 mA?
hours
..! See Periodic Tab
Chapter 7 Solutions
Chemistry In Context
Ch. 7.1 - Prob. 7.2YTCh. 7.2 - Skill Building Coulombs The SI unit of electric...Ch. 7.2 - Prob. 7.4YTCh. 7.4 - Prob. 7.5YTCh. 7.4 - Scientific Practices The Shift from NiCd to NiMH...Ch. 7.5 - Scientific Practices The Battery in Your Car Lets...Ch. 7.7 - Prob. 7.9YTCh. 7.8 - Prob. 7.10YTCh. 7.9 - Prob. 7.11YTCh. 7.9 - Prob. 7.12YT
Ch. 7.10 - Prob. 7.13YTCh. 7.10 - Prob. 7.14YTCh. 7.11 - Skill Building Metal Refining (Smelting) The...Ch. 7.11 - You Decide Could Metals Become Extinct? In 2015,...Ch. 7.11 - Prob. 7.17YTCh. 7 - You Decide The Baghdad Battery Alessandro Volta is...Ch. 7 - Prob. 1QCh. 7 - Prob. 2QCh. 7 - Which chemical species gets oxidized and which...Ch. 7 - What is the difference between a galvanic cell and...Ch. 7 - Two common units associated with electricity are...Ch. 7 - Consider the galvanic cell pictured. A coating of...Ch. 7 - Prob. 7QCh. 7 - a. How does the voltage from a tiny AAA alkaline...Ch. 7 - Identify the type of galvanic cell commonly used...Ch. 7 - The mercury battery has been used extensively in...Ch. 7 - Prob. 12QCh. 7 - During the conversion of O2(g) to H2O(l) in a fuel...Ch. 7 - How does the reaction between hydrogen and oxygen...Ch. 7 - This diagram represents the hydrogen fuel cell...Ch. 7 - What is a PEM fuel cell? How does it differ from...Ch. 7 - How do PEM fuel cells allow H2 and O2 to combine...Ch. 7 - In addition to hydrogen, methane also has been...Ch. 7 - Prob. 19QCh. 7 - Potassium and lithium both are reactive Group 1...Ch. 7 - What challenges keep hydrogen fuel cells from...Ch. 7 - Explain the concept of energy density of a battery...Ch. 7 - Describe how a normal AA battery stores and...Ch. 7 - Prob. 24QCh. 7 - What is the difference between an electrolytic...Ch. 7 - Provide some differences between a leadacid...Ch. 7 - Describe the importance of a separator in primary...Ch. 7 - The company ZPower is promoting its silverzinc...Ch. 7 - Prob. 29QCh. 7 - Prob. 30QCh. 7 - Describe some advantages and disadvantages of...Ch. 7 - You never need to plug in Toyotas gasolinebattery...Ch. 7 - Prob. 33QCh. 7 - Hydrogen is considered an environmentally friendly...Ch. 7 - Fuel cells were invented in 1839 but never...Ch. 7 - Hydrogen and methane both can react with oxygen in...Ch. 7 - Engineers have developed a prototype fuel cell...Ch. 7 - Prob. 38QCh. 7 - Describe some similarities and differences between...Ch. 7 - Prob. 40QCh. 7 - Prob. 41QCh. 7 - Prob. 42QCh. 7 - Small quantities of hydrogen gas can be prepared...Ch. 7 - Prob. 44QCh. 7 - Although Alessandro Volta is credited with the...Ch. 7 - Prob. 46QCh. 7 - Prob. 47QCh. 7 - What is the tragedy of the commons? How does this...Ch. 7 - How can the principles of green chemistry be...Ch. 7 - If all of todays technology presently based on...Ch. 7 - Consider these three sources of light: a candle, a...Ch. 7 - Prob. 52Q
Additional Science Textbook Solutions
Find more solutions based on key concepts
4.1 Write the symbols for the following elements.
a. copper
b. platinum
c. calcium
d. manganese
e. Iron
...
Chemistry: An Introduction to General, Organic, and Biological Chemistry (13th Edition)
Practice Exercise 1
Which of the following factors determines the size of an atom? a. the volume of the nucleus...
Chemistry: The Central Science (13th Edition)
4. 38 Strontium has four naturally occurring isotopes, with mass numbers 84, 86, 87, arid 88.
a. Write the atom...
General, Organic, and Biological Chemistry: Structures of Life (5th Edition)
For each of the following 2-dimensional shapes, determine the highest order rotation axis of symmetry.
Inorganic Chemistry
4.1 Write the symbols for the following elements.
a. copper
b. platinum
c. calcium
d. manganese
e. Iron
...
Chemistry: An Introduction to General, Organic, and Biological Chemistry (12th Edition) - Standalone book
Practice Exercise 1
Which of the following factors determines the size of an atom? a. the volume of the nucleus...
Chemistry: The Central Science (14th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- An aqueous solution of an unknown salt of vanadium is electrolyzed by a current of 2.50 amps for 1.90 hours. The electroplating is carried out with an efficiency of 95.0%, resulting in a deposit of 2.850 g of vanadium. a How many faradays are required to deposit the vanadium? b What is the charge on the vanadium ions (based on your calculations)?arrow_forward13.106 Hydrazine, N2H4 , has been proposed as the fuel in a fuel cell in which oxygen is the oxidizing agent. The reactions are N2H4(aq)+4OH-(aq)N2(g)+4H2O(l)+4eO2(g)+2H2O(l)+4e4OH-(aq) (a) Which reaction occurs at the anode and which at the cathode? (b) What is the net cell reaction? (C) If the cell is to produce 0.50 A of current for 50.0 h, what mass in grams of hydrazine must be present? (d) What mass in grams of O2 must be available to react with the mass of N2H4 determined in part (c)?arrow_forwardIf alkaline batteries were not alkaline but rather acidic (as in the older dry cell batteries), what extra difficulties could you envision with corrosion, based on reactions that are part of the table of standard reduction potentials?arrow_forward
- Use electrode potentials to answer the following questions, assuming standard conditions. a Do you expect permanganate ion (MnO4 ) to oxidize chloride ion to chlorine gas in acidic solution? b Will dichromate ion (Cr2O72) oxidize chloride ion to chlorine gas in acidic solution?arrow_forwarda Search Close Activity Chat Teams Assignments 26 Calendar Consider the standard electrode potentials of the following reactions. Cr3+(aq) + 3e- -Cr(s) Cd2+(aq) + 2e- → Cd(s) What is the approximate value of the electrical energy(E) in kilojoules? The value of Faraday's constant is 96,500 J/v.mol.e- * -0.75 V -0.40 V Calls Files 2Cr(s) + 3Cd 2Cr + 3Cds) 200 KJ 201 KJ 202 KJ 203 KJ 00 Apps (? Help >> 1:49 PM W Desktop 12/13/2021arrow_forwardFor the redox reaction given below complete the following: Cr203 + Ca 3Cao + Cr (a) What is the oxidation no. of Cr in Cr203? Choose. (b) What is the oxidation no. of Ca Choose.. (C) Find the element oxidized Choose. (d) Find the element Reduced Choose. (e) Find the Oxidizing Agent Choose. (f) Find the Reducing Agent Choose. (g) How many electrons transferred in this reaction? Choose.arrow_forward
- An antique automobile bumper is to be chrome plated. The bumper, which is dipped into an acidic Cr205 solution, serves as a cathode of an electrolytic cell. The atomic mass of Cr is 51.996; 1 faraday = 96,485 coulombs. 40. If the current is 10.0 amperes, how long will it take to deposit 139 grams of Cr(s) onto the bumper? a. 7.16 h b. 1.79 days c. 71.6 min d. 2.67 min e. 2 mo, 25 days, 14 h, and 6 sarrow_forwardChapter 20 Multiple Choice Question 59 Part A What mass of aluminum can be plated onto an object in 378 minutes at 5.80 A of current? 12.3 g 36.8 g 220. g 73.5 g 0.613 g Submit Request Answerarrow_forward21.22 Write the cell notation for the voltaic cell that incorporates each of the following redox reactions: (a) Al(s) + Cr*(aq) (b) Cu²*(aq) + SO,(g) + 2H,O(1) Al3 (aq) + Cr(s) Cu(s) + SO,2-(aq) + 4H (ag) 21.23 Write a balanced equation from each cell notation: (a) Mn(s) | Mn²* (aq) || Cd²"(aq) | Cd(s) (b) Fe(s) | Fe2*(aq) || NO, (aq) | N0(g) | Pt(s)arrow_forward
- Answers are to check your work, please solve the questions. 1) Balance the following reaction for acidic and then basic conditions. VO2+ + Zn --> VO2+ + Zn2+ 2) Balance the equation for the oxidation of an iodide ion, I-, by a permanganate ion, MnO4-, in basic solution to yield iodine, I2, and manganese (IV) oxide, MnO2. Answers 1) Acidic: 2VO2+ + 4H+ + Zn --> 2VO2+ + 2H2O + Zn2+ Basic: 2VO2+ + 2H2O + Zn --> 2VO2+ + Zn2+ + 4OH- 2) Acidic: 8H+ + 2MnO4- + 6I- --> 2MnO2 + 4H2O + 3I2 Basic: 4H2O + 2MnO4- + 6I- --> 2MnO2 + 3I2 + 8OH-arrow_forwardUsing data from the Standard Reduction Potentials table, place the following in order of increasing strength as oxidizing agents (all under standard conditions). (Use the appropriate symbol to separate substances in the list.) chemPad 2+ Cd²+, K+, Cr³+, Au³+, 103¯¯, and Ba 2+ XX→→ Need Help? Read It Supporting Materials Periodic Table Help Greek Constants & Factors Supplemental Dataarrow_forwardA student uses a battery to electrolyze an aqueous solution of ZnF2 in a U-tube just like we did in Exp #8. Given the reduction potentials provided on the reference sheet, which of the following is the correct cathode and anode? a) Zn2+ is reduced at the cathode while F- is oxidized at the anode. b) Zn2+ is reduced at the cathode while water is oxidized at the anode. c) Water is reduced at the cathode while F- is oxidized at the anode. d) Water is reduced at the cathode while water is oxidized at the anode. e) No reaction occurs.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Chemistry for Engineering StudentsChemistryISBN:9781337398909Author:Lawrence S. Brown, Tom HolmePublisher:Cengage LearningGeneral Chemistry - Standalone book (MindTap Cour...ChemistryISBN:9781305580343Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; DarrellPublisher:Cengage Learning
Chemistry for Engineering Students
Chemistry
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Cengage Learning
General Chemistry - Standalone book (MindTap Cour...
Chemistry
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Cengage Learning
Introduction to Electrochemistry; Author: Tyler DeWitt;https://www.youtube.com/watch?v=teTkvUtW4SA;License: Standard YouTube License, CC-BY