ECON 102 Midterm: ECON 102 UW Madison 2 MidtermSpring2010scottv1
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Answer question #1, #2 and either #3 or #4. Please state any additional assumptions you made, and show all work. If you don"t have time to complete a section, please describe how you would solve the problem (without using a computer program such as mineql). 1 joule = 0. 239 calories: buffers (25%) You have prepared a 10 mm phosphate buffer designed to hold ph at 8. 1 (25 c, assume i~0). If you were to elevate the solution ph to 12. 0, how much naoh would you need to add (again in mm): redox (25%) often are found in groundwaters with both reduced and oxidized iron. Sulfide and sulfate are two forms of sulfur that commonly exist in the aquatic environment. Assume a free ferrous iron concentration of 0. 56 mg/l. 1: solubility (50%) answer this or #4, your choice. Ferrous sulfide (troilite, a form of pyrrhotite) is a rather insoluble mineral with a kso of about 10-18. 1.
