Will give medals!
In my lab for copper cycling, we performed a bunch of reactions to copper and had to record observations (I attached the table of all the observations that I did in each reaction).
my question is what 2 sources of experimental error could lead to a mass of reclaimed copper LESS than that originally used. i know decanting is one example, but i cant think of another.. he wants us to relate this to specific chemical reactions.
I don't want an answer, but perhaps a jog in the right direction?

Question

Will give medals!
In my lab for copper cycling, we performed a bunch of reactions to copper and had to record observations (I attached the table of all the observations that I did in each reaction). 
my question is what 2 sources of experimental  error could lead to a mass of reclaimed copper LESS than that originally used. i know decanting is one example, but i cant think of another.. he wants us to relate this to specific chemical reactions. 
I don't want an answer, but perhaps a jog in the right direction?

x3_drummerchick · Answer

attachment