Question

1. If you began with 0.5296 g of copper mesh and recovered 0.2937 elemental copper, what would be the percent recovery of copper metalo 2. Describe the differences in the appearance of the copper mesh vs. the appearance of the elemental copper at the end of the reaction sequen Why should you be careful not to overheat the crude copper metal in the evaporating dish. Which reaction do you think might occur if the sample is heated too strongly? How would this affect the mass of your sample? Indicate the charge (oxidation state) on the copper atoms in the ionic compounds below: CUNO3 CuCl2 Cu2O3 CUCO3

Answer 1

Ans 1 :

Percent recovery = ( amount of solid recovered / amount of starting sample) x 100

here amount of solid recovered = 0.2937 g

amount of starting sample = 0.5296 g

putting values :

= (0.2937 g / 0.5296 g ) x 100

= 55.4 %