Question

How long would it take to deposit 500 g of silver metal from a solution containing Ag+ ions using a current of 3.00 amperes? If the same time was spent depositing gold metal from a solution containing Au3+ ions using the same current, how much weight would of gold would be deposited? If you had 23 spoons that you wanted to coat with either silver or gold, and each spoon had a surface area of 150 mm2, how thick a coating could you make with each metal (for the same time spent in the electrolysis bath)? The density of silver is 10.5 g/mL and the density of gold is 19.3 g/mL.

Answer 1

For silver,

Convert time from seconds to hours

Hence, time required to deposit 500 g of silver is 41.4 hours.

For gold,

Hence, 304 grams of gold can be deposited.

The density of silver is 10.5 g/mL

The weight of silver is 500 g.

Volume of silver

Convert unit from mL to mm.³

Surface area of one spoon is 150 mm².

Surface area of 23 spoons is

Thickness of silver coating

The density of gold is 19.3 g/mL

The weight of gold is 304.1 g.

Volume of gold

Convert unit from mL to mm.³

Surface area of one spoon is 150 mm².

Surface area of 23 spoons is

Thickness of gold coating