Select your language

Suggested languages for you:
Log In Start studying!
Answers without the blur. Sign up and see all textbooks for free! Illustration

Q. 43

Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 763

Answers without the blur.

Just sign up for free and you're in.


Short Answer

A sculptor has asked you to help electroplate gold onto a brass statue. You know that the charge carriers in the ionic solution are singly charged gold ions, and you've calculated that you must deposit of gold to reach the necessary thickness. How much current do you need, in , to plate the statue in hours?

The amount of current need to plate the statue in is

See the step by step solution

Step by Step Solution

Step 1: Given Information

Amount of gold


Necessary current to plate the statue in

Step 2: Explanation 

Due to the missing electron on slightly charged ions, they carry a positive charge .

The total charge passing through the solution onto the statue is, therefore:


Total number of ions that pass is,

Total number of ions necessary for is

Here is the mass of one ion of gold.

Now, can be calculated by dividing the molar mass of gold with Avogadro's constant

Which yields,

Equating (equation 1) with (equation 2) we find

This finally gives the expression for the current

Molar mass of gold is ,

Step 3: Final Answer

Hence, the amount of current need to plate the statue in is

Most popular questions for Physics Textbooks


Want to see more solutions like these?

Sign up for free to discover our expert answers
Get Started - It’s free

Recommended explanations on Physics Textbooks

94% of StudySmarter users get better grades.

Sign up for free
94% of StudySmarter users get better grades.