University of the West of England Bristol Chemistry Exercise
Question Description
I’m working on a chemistry multi-part question and need an explanation to help me study.
A weight of 2.50 g of copper(II) sulfate pentahydrate and 3.6 g of aspirin were used to make copper aspirinate, [Cu2(asp)4], as given in the practical instruction sheet on Blackboard. A weight of 4.00g Cu2(asp)4 was obtained, and the infrared spectra of this complex and its pyridine (py) product, [Cu(asp)2(py)2], were recorded. The wavenumber positions for carbon to oxygen stretches of these two complexes are given below.
n(CO2–) carboxylate:
Cu2(asp)4 = 1,620 and 1,420 cm-1
[Cu(asp)2(py)2] = 1,603 and 1,405 cm-1
n(C=O) carbonyl:
Cu2(asp)4 = 1,756, 1724 and 1,614 cm-1
[Cu(asp)2(py)2] = 1,748 and 1,595 cm-1
(a) Give below your calculated theoretical weight expected, and the percentage yield obtained, of copper aspirinate. Show your calculations.
Have a similar assignment? "Place an order for your assignment and have exceptional work written by our team of experts, guaranteeing you A results."
