This question is about copper and its compounds.
Complete the electronic configurations of Cu and Cu2+.
Cu [Ar].................................................................................................................
Cu2+ [Ar]..............................................................................................................
7 marksA sample of copper contains the isotopes 63Cu and 65Cu.
(2)
| Isotope | Protons | Neutrons | Electrons |
| 63Cu | |||
| 65Cu |
(2)
(1)
Calculate the percentage abundances of the isotopes 63Cu and 65Cu in this sample.
You must show your working.
(2)
5 marksCopper(II) sulfate, CuSO4, can be made by reacting solid copper(II) carbonate with dilute sulfuric acid.
Write an equation for the reaction that occurs.
State symbols are not required.
(1)
An experiment was carried out to produce pure, dry crystals of hydrated copper(II) sulfate, CuSO4 •5H2O.
Copper(II) carbonate was mixed with 50.0 cm3 of 1.00 mol dm–3 sulfuric acid until no more reacted.
The mass of CuSO4 •5H2O obtained was 10.87g.
Calculate the percentage yield for this reaction, giving your answer to an appropriate number of significant figures.
[Molar mass of CuSO4 •5H2O = 249.6 g mol−1 ]
(4)
Did this page help you?