Question

You perform an electrochemical reaction in which 0.800 moles of Cu* are reduced to solid Cu. How many coulombs of charge were transferred? Number How many electrons are in this amount of charge? Number

Answer 1

Cu⁺ + e^- ------> Cu

1 mole Cu⁺ require 96487 C charge

0.800 moles Cu⁺ require 0.800 x 96487 / 1 = 77189.6 C charge

Charge in C = 77189.6 C

1 mole Cu⁺ = 6.023 x 10²³ electrons

0.800 moles Cu⁺ = 0.800 x 6.023 x 10²³ / 1 = 4.82 x 10²³ electrons

number of electrons = 4.82 x 10²³ e^-