WorksheetsE3 Reactions of copper
Total questions: 12
Worksheet time: 6mins
Predict the effect on calculated % yield.
The precipitate was weighed even if traces of red brick solids are present
Increase
Decrease
No effect
Indeterminate
Predict the effect on calculated % yield.
Addition of H2SO4 was stopped even there are still black precipitate in the filter paper
Increase
Decrease
No effect
Indeterminate
Predict the effect on calculated % yield.
Litmus paper did not change to blue when moistened with supernatant.
Increase
Decrease
No effect
Indeterminate
What is the compound in [1]?
(a)
What is the reagent in [4]?
(a)
What is the compound in [5]?
(a)
What is the answer in [6]?
(a)
What is the color of the solution after addition of H2SO4?
(a)
What is the answer in [8]?
(a)
[9] What is the product when the reaction is complete?
[Zn(NH3)2]^2+
[Zn(NH3)4]^2+
[Cu(NH3)4]^2+
[Cu(NH3)4]^+
[10] What is the product when the reaction is incomplete?
[Zn(NH3)2]^2+
[Zn(NH3)4]^2+
[Cu(NH3)4]^2+
[Cu(NH3)4]^+
Predict the effect on the calculated %yield.
Insufficient amount of HCl was added
Increase
Decrease
Indeterminate
No effect
