Chemistry - Electroplating - URGENT

"To save on production costs, most automobile bumpers are never coated with more than 200 g of chromium. Determine how much time a standard bumper should be immersed in a chromium vat."

This is what I have so far-

96,485 coulombs are required to plate 1 Cr; 52/6 = 8.67g.

To plate 200g:
96.485 * (200/8.67) = 96.485 * 23.068 C = 2,225.721 coulombs
1 A = 1 C/s
(amperes) x (time) = 2,225.721 coulombs.

I know this may seem stupid but I can't seem to remember how to determine amps. Please help.

  1. 👍 0
  2. 👎 0
  3. 👁 257
asked by Em
  1. I believe you should have divided 52 by 3; the electroplating probably goes from Cr^3+ to Cr which is a change of 3 electrons.
    Then coulombs needed = 96,485 x (200/17.3) = ?
    C = amps x seconds but you have two unknowns. You don't know amps (usually given in the problem) or seconds (which is what the problem is asking).

    1. 👍 0
    2. 👎 0
  2. Ahh thank you - so then there would be 8346.453 coulombs needed instead of 2225.721.

    As there are two unknowns, I cannot solve this problem any further... this is for an assignment due tomorrow, what should I do?

    1. 👍 0
    2. 👎 0
    posted by Em
  3. Sorry that should say 1115433.526 coulombs, not 8346.453.

    1. 👍 0
    2. 👎 0
    posted by Em

Respond to this Question

First Name

Your Response

Similar Questions

  1. chemistry

    To save on production costs, most automobile bumpers are never coated with more than 200 g of chromium. Determine how much time a standard bumper should be immersed in a chromium vat. need full explanation i did find this question

    asked by dano on May 28, 2013
  2. chemistry

    "To save on production costs, most automobile bumpers are never coated with more than 200 g of chromium. Determine how much time a standard bumper should be immersed in a chromium vat." This is what I have so far- 96,485 coulombs

    asked by anonymous on June 17, 2014
  3. Chem

    Electroplating is a widely used process. One of the most popular electroplating processes involves the plating of two metals, nickel and chromium, in separate vats. Nickel is plated first because it adheres better to iron, then

    asked by Shyanne on May 28, 2013
  4. FINANCIAL MATHEMATICS

    The variable costs associated with a certain process are $0.65 per item. The fixed costs per day have been calculated as $200 with special costs estimated as $0.02X^2, where X is the size of the production run (that is, number of

    asked by FAKAAPO.SUETUSI on October 6, 2011
  5. Calculus

    "The production amount, Q, of an item manufactured by a company is modeled by the CobbDouglas function Q = 200(K^0.6)(L^0.4)(T^0.3) where K is the quantity of capital investment, L is the quantity of labor used, and T is the

    asked by Brittany on March 30, 2011
  1. Economics

    The law of increasing costs means that as production shifts from one item to another, A. the cost of production gets cheaper and cheaper. B. the cost of producing an item stays the same no matter how many are produced. C. more and

    asked by Nirvana on January 29, 2016
  2. Maths - Linear Programming

    Hey, I'm having trouble formulating this as a linear program. If anyone could help at all it would be much appreciated. Thanks A manufacturer has contracted to produce 2,000 units of a particular product over the next eight

    asked by Auriela on September 14, 2008
  3. Business-Ms. Sue

    Ms. Sue you know how yesterday you and I both worked on the natural resources, capitol, etc. Well I listed some things like cell phones etc. which were not connected with the production of an automobile. This is my assignment:

    asked by Anonymous on February 2, 2011
  4. math

    You are thinking of making your mansion more energy efficient by replacing some of the light bulbs with compact fluorescent bulbs, and insulating part or all of your exterior walls. Each compact fluorescent light bulb costs $4 and

    asked by LIZ on January 28, 2011
  5. Tech

    __________ is one of the few major indicators for which the ratio of production between the U.S. and China reflects the ratio of population size. A. Bicycle production B. Meat consumption C. Automobile production D. Fertilizer use

    asked by Amy on August 12, 2014

More Similar Questions