Calculations 2 Flashcards
(4 cards)
1
Q
What is the calculation for percentage yield?
A
Percentage yield = (actual yield / theoretical yield) x 100
2
Q
What happens when copper (2) carbonate decomposes?
A
Green to black copper (2) oxide
CuCO3(s) to CuO(s) + CO2 (g)
3
Q
What happens when zinc carbonate decomposes?
A
White to yellow zinc oxide when hot, but goes back to white when cooled
ZnCO3(s) to ZnO(s) + CO2 (g)
4
Q
What happens when calcium carbonate decomposes?
A
Requires very high temperatures
Both are white
CaCO3(s) to CaO(s) + CO2(g)
