Question

A electrolytic cell is set up as was done in this experiment but with a different metal. An average current of 150.1 mA is delivered for 17 minutes and 42 seconds. The cathode gains 0.1641 g in mass. If there are three moles of electrons transferred per mole of the metal, what is the molar mass of the metal?

Answer 1

Answer:

88.614 gm/mol

Explanation:

amount of charge passed through the cell

= 150.1×10^-3 A×17.42 min× 60 = 156.88C = 156.88/96500 C/F

=1.62×10^-3 F

molar mass of the metal = 0.1641 gm/3mole metal/F × 1.62×10^-3 F =88.614 gm/mol