1.) You have been asked to produce 7.8 g isotopically labeled copper sulfate pentahydrate. You start with copper metal that contains 95 % (w/w) 67Cu, which has a half-life of 61.83 hours and 83 % (w/v) sulfuric acid. Calculate the charges of the reactants, if the isolated yield reported in the literature was 91.3 % of theory. What is the copper metal contaminated with?
2.)What is the weight of 67Cu in your product, if synthesis and purification took 2 days?
3.)In a second step, you heat all of your product to 650 °C, where copper-(II)-sulfate decomposes to copper-(II)-oxide and sulfur trioxide. How many liters of sulfur trioxide do you release under standard conditions. Assuming the latter reaction has an equilibrium constant of 2.4 x 108, what is the expected yield of copper-(II)-oxide if this step took 16 hours?