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.
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
1 answer
1 answer