A sphere 100 mm diameter is to be coated with chromium from a solution
containing chromium in the six valent (hexavalent) state. How much time
would be needed to produce a coating 20 micro millimetres thick if;
the current is 20 A
• the cathodic efficiency is 15%
• the atomic weight and density of chromium are 52 and 7.2 gcm respectively
So far Iam working on the basis that the equation to be transposed should be
Any help here would be extremely grateful as I am really struggling with this one. Many thanks.....