Question

Briefly explain whether the following procedural error would result in either an incorrectly high or incorrectly low calculated percent recovery of Copper

Answer 1

a. when converting Cu(OH)2 to CuO, the solution was not basic before being heated

Answer 2

b. a slightly blue solution was decanted when reducing [Cu(H2O)6]^2+ with zinc

Answer 3

c. the water in the beaker containing Cu was boiled away, exposing the watch glass to excess heat