"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.
To determine the amperage required to plate the bumper, you can rearrange the formula:
I (amperage) = Q (charge in coulombs) / t (time in seconds)
In this case, we have the required charge, which is 2,225.721 coulombs. We need to find the time, so we rearrange the formula:
t = Q / I
Now, you need to substitute the values given into the formula:
t = 2,225.721 C / I
To determine the amperage, you would need to recall Ohm's Law, which states:
V (voltage) = I (amperage) x R (resistance)
In this case, you don't have the resistance or the voltage. However, you can make an assumption based on the context of the problem that the voltage is constant, and the resistance will be determined by the given information.
Since the problem states that 96,485 coulombs are required to plate 1 Cr (chromium), you can assume that the voltage is set so that the resistance for plating 1 Cr is constant.
So, to find the amperage, you need to determine the resistance for plating 1 Cr.
Given that 96,485 coulombs are required to plate 1 Cr, you can use the formula V = I x R, and assume the voltage (V) is constant, to solve for resistance (R):
V = I x R
R = V / I
Now, you don't have the voltage given, but you can ignore it for this particular calculation. Assuming the voltage is constant, you can also ignore it when calculating the resistance for plating 1 Cr.
So, the resistance for plating 1 Cr is:
R = 1 Cr
With this information, you now have the resistance values needed to determine the amperage:
R = 1 Cr
Q = 96,485 C (charge to plate 1 Cr)
Remember, the goal is to determine the time required to plate the bumper, and you have the charge (Q) needed to plate the bumper.
You can now substitute the values into the formula:
t = Q / I
With the given values,
t = 2,225.721 C / I
Since you don't have the exact amperage value (I), you won't be able to calculate the exact time required. However, you can rearrange the formula to solve for amperage if you have a desired time in mind:
I = Q / t
Substituting the values,
I = 2,225.721 C / t
By manipulating the formulas, you can solve the problem based on the information given.