Copper Lab Flashcards
What color is copper? Is it soluble?
Rust red
Insol
What color is CU(NO3)2? Sol?
Bright blue
Sol
What color is CUCO3
Light blue
Inspo
What color is CuCl2?
Green-blue
Soluble
What color is CuSO4?
Bright blue
Sol
What color is Cu(OH)2?
Pale blue
Insol
What color is CuO?
Brown-black
Insol
Reaction of copper (ii) nitrate to copper (ii) carbonate
Cu(NO3)2 + Na2CO3 = CUCO3 + 2NaNO
Reaction of copper carbonate to copper chloride
CUCO3 + 2HCl = CuCl2 + H2CO3
What is the gas produced in part A, B, and C?
A NO2, NO
B CO2
C CO2
What is the equation for the red brown gas in part A
NO + 1/2 O2 = NO2
Equation for gas in part B
H2CO3 = H2O + CO2
If filtrate in part B was clear and dark blue how + why would percent yield be affected?
There would be no precipitate and the blue is Cu2+ ions so not all Cu2+ has precipitated with CO3 meaning it has passed through into the filtrate and will give a low yield
3 reasons why percent yield is less than 100
Not all cu2+ reacted w co3
Losing CUCO3 during transfer
Did not turn colorless during reduction of Cu2+ to Cu (s)
Reason why % yield might be over 100%
Cu is still wet
