current of 40 Ampere is passed through a solution of gold salt for 1 hour 30 min.calculate the.
Mass of gold deposited.
The number of moles of gold deposited.
If the current is used find the time taking for 5g of gold deposited
The problem doesn't say WHAT Au salt. I will assume it was a solution of Au^3+
Coulombs = amperes x seconds
C = 40 A x 90 minues x (60 sec/min) = 216,000
You know that 96,485 C will deposit 197/3 or 65.67 g Au.
Therefore, grams Au from216,000 C will be
65.67 g Au x (216,000/96,485) = ?
To find moles Au that is moles = grams/atomic mass.
The third question you asked can't be calculated since you didn't specify the current. When you know the current just work the problem I show above backwards. Post your work if you get stuck.