We are open Saturday and Sunday!

Call Now to Set Up Tutoring:

(888) 888-0446

AP Chemistry : Electrolysis and Faraday's Law

Study concepts, example questions & explanations for AP Chemistry

Create An Account

All AP Chemistry Resources

6 Diagnostic Tests 225 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

Example Question #1 : Electrolysis And Faraday's Law

How many grams of Cr can be obtained by the electrolysis of a Cr(NO₃)₃ if 10 amps are passed through the cell for 6 hours?

Possible Answers:

12.5 g

56.3 g

38.8 g

19.4 g

103 g

Correct answer:

38.8 g

Explanation:

$Cr^{3+} + 3 e- \rightarrow Cr(s)$

$mass = \frac{10 A \, x\, 6 hr \, x \, \frac{3600 s}{1 hr}}{ \frac{96485 C}{mol e-} } \, x \, \frac{1 mol \, Cr}{3 mol e-} \, x \, \frac{51.996 g \, Cr}{1 mol \, Cr}= 38.8 g$

Report an Error

Example Question #685 : Ap Chemistry

How much Al would be precipitated if an AlCl₃ solution was electrolyzed for 1.00 hours with 5.00 amps?

Possible Answers:

6.72 g

0.84 g

1.25 g

1.68 g

3.36 g

Correct answer:

1.68 g

Explanation:

$Al^{3+} + 3 e- \rightarrow Al(s)$

$mass = \frac{5 A x 1 hr \, x \, \frac{3600 s}{1 hr} }{\frac{96485 C}{mol e-}} \, x \, \frac{1 mol \, Al }{3 \, mol \, e-}\, x\, \frac{26.982 g Al}{1 mol Al} = 1.68 g$

Report an Error

Example Question #1 : Electrolysis And Faraday's Law

What current must be past through a solution of AlCl₃ for 1.19 hours to produce 40g of solid Al?

Possible Answers:

50.0 amps

100. amps

10.5 amps

75.3 amps

125 amps

Correct answer:

100. amps

Explanation:

$Al^{3+} + 3 e- \rightarrow Al(s)$

$40g \, Al \: x \, \frac{1\, mol \, Al}{26.982g}\, x\, \frac{3 \, mol \, e-}{1 \, mol \, Al} \, x \, \frac{96485 C}{1 \, mol \, e^-} = 429108 \, C$

$Current \, x \, time\, (sec) = Coulombs$

$Current = \frac{429108 C}{1.19hr \, x \, \frac{3600 s}{1hr}} = 100 A$

Report an Error

Example Question #2 : Electrolysis And Faraday's Law

In the electrolysis of CaCl₂ a 1.15 amp current is passed through the cell for 5.0 hours. How much Ca is produced?

Possible Answers:

18.3 g

8.6 g

1.1 g

4.3 g

2.2 g

Correct answer:

4.3 g

Explanation:

$Ca^{2+} + 2 e- \rightarrow Ca(s)$

$mass = \frac{1.15 A \, x \, 5 \, hr \, x\, \frac{ 3600 \, s}{1 \, hr} }{\frac{96485\, C}{mol \, e-}}\, x \, \frac{1 mol Ca }{2\, mol \, e-}\, x \, \frac{40.078 g \, Al}{1 mol \, Al}= 4.3 g$

Report an Error

Example Question #1 : Electrolysis And Faraday's Law

How long would it take to electroplate 28.3g of silver at a constant current of 2.0 amps from a solution of silver nitrate?

Possible Answers:

422 min

211 min

844 min

53 min

105 min

Correct answer:

211 min

Explanation:

$Ag^+ + 1 e- \rightarrow Ag(s)$

$28.3g \: Ag \: x \: \frac{1 mol Ag}{107.87g} \: x \: \frac{1 mol e-}{1 mol Ag^+ } \: x \: \frac{96485 C}{1 mol e^-} = 25313 C$

$Current \, x \, time (sec) = Coulombs$

$time = \frac{25313 C}{2 A}\: x \: \frac{1 min}{60 sec} = 211 min$

Report an Error

View AP Chemistry Tutors

Muhammad
Certified Tutor

The University of Texas at Dallas, Bachelor of Science, Mechanical Engineering.

View AP Chemistry Tutors

Mohammad Talha
Certified Tutor

University of Toronto, Mississauga, Bachelor, Chemistry, and Environmental Science.

View AP Chemistry Tutors

Valerie
Certified Tutor

Slippery Rock University of Pennsylvania, Bachelor in Arts, Chemistry. Slippery Rock University of Pennsylvania, Masters in E...

All AP Chemistry Resources

6 Diagnostic Tests 225 Practice Tests Question of the Day Flashcards Learn by Concept

Popular Subjects

LSAT Tutors in Miami, Chemistry Tutors in Philadelphia, English Tutors in Philadelphia, ACT Tutors in Boston, English Tutors in Washington DC, GMAT Tutors in Phoenix, Chemistry Tutors in Washington DC, Calculus Tutors in Philadelphia, French Tutors in Seattle, SSAT Tutors in Seattle

Popular Courses & Classes

GMAT Courses & Classes in Philadelphia, SAT Courses & Classes in Washington DC, GRE Courses & Classes in New York City, GMAT Courses & Classes in Seattle, ACT Courses & Classes in Los Angeles, LSAT Courses & Classes in Miami, GRE Courses & Classes in Boston, LSAT Courses & Classes in Boston, MCAT Courses & Classes in Atlanta, SSAT Courses & Classes in Boston

Popular Test Prep

LSAT Test Prep in Philadelphia, MCAT Test Prep in Atlanta, SAT Test Prep in Denver, GRE Test Prep in Los Angeles, GMAT Test Prep in Houston, LSAT Test Prep in Boston, MCAT Test Prep in Los Angeles, ACT Test Prep in Atlanta, MCAT Test Prep in Seattle, SAT Test Prep in Philadelphia

DMCA Complaint

If you believe that content available by means of the Website (as defined in our Terms of Service) infringes one or more of your copyrights, please notify us by providing a written notice (“Infringement Notice”) containing the information described below to the designated agent listed below. If Varsity Tutors takes action in response to an Infringement Notice, it will make a good faith attempt to contact the party that made such content available by means of the most recent email address, if any, provided by such party to Varsity Tutors.

Your Infringement Notice may be forwarded to the party that made the content available or to third parties such as ChillingEffects.org.

Please be advised that you will be liable for damages (including costs and attorneys’ fees) if you materially misrepresent that a product or activity is infringing your copyrights. Thus, if you are not sure content located on or linked-to by the Website infringes your copyright, you should consider first contacting an attorney.

Please follow these steps to file a notice:

You must include the following:

A physical or electronic signature of the copyright owner or a person authorized to act on their behalf; An identification of the copyright claimed to have been infringed; A description of the nature and exact location of the content that you claim to infringe your copyright, in \ sufficient detail to permit Varsity Tutors to find and positively identify that content; for example we require a link to the specific question (not just the name of the question) that contains the content and a description of which specific portion of the question – an image, a link, the text, etc – your complaint refers to; Your name, address, telephone number and email address; and A statement by you: (a) that you believe in good faith that the use of the content that you claim to infringe your copyright is not authorized by law, or by the copyright owner or such owner’s agent; (b) that all of the information contained in your Infringement Notice is accurate, and (c) under penalty of perjury, that you are either the copyright owner or a person authorized to act on their behalf.

Send your complaint to our designated agent at:

Charles Cohn Varsity Tutors LLC
101 S. Hanley Rd, Suite 300
St. Louis, MO 63105

Or fill out the form below:

Do not fill in this field

Contact Information

* Full legal name

Company name

* Phone number

* Email address

Address

* Address1

Address2

* City

* State

* Zipcode

* Country

Complaint Details

* URL of copyrighted work (where your original material is located)

* Please describe the copyrighted work so that it may be easily identified

I am the owner, or an agent authorized to act on behalf of the owner of an exclusive right that is allegedly infringed.

I have a good faith belief that the use of the material in the manner complained of is not authorized by the copyright owner, its agent, or the law.

This notification is accurate.

I acknowledge that there may be adverse legal consequences for making false or bad faith allegations of copyright infringement by using this process.

* Signature (your digital signature is legally binding)

HIGH SCHOOL

GRADUATE SCHOOL

K-8

Search 50+ Tests

math tutoring

science tutoring

foreign languages

elementary tutoring

other

Search 350+ Subjects

AP Chemistry : Electrolysis and Faraday's Law

Study concepts, example questions & explanations for AP Chemistry

All AP Chemistry Resources

Example Questions

Example Question #1 : Electrolysis And Faraday's Law

Example Question #685 : Ap Chemistry

Example Question #1 : Electrolysis And Faraday's Law

Example Question #2 : Electrolysis And Faraday's Law

Example Question #1 : Electrolysis And Faraday's Law

All AP Chemistry Resources

Report an issue with this question

DMCA Complaint

Contact Information

Address

Complaint Details

Email address:
Your name:
Feedback: