Assignment1

Assignment1 - Analytical Methods (CHEM 207) Assignment 1:...

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Analytical Methods (CHEM 207) Assignment 1: Sunday, September 19, 2010 Name:____________________________________ Show all your work clearly. Use K w = 1.0 ×10 -14 where necessary. 1. An aqueous solution containing 20.0% KI has a density of 1.168 g/mL. Calculate the (i) molality and (ii) molarity of this solution. ( 2 pts ) 2. How many grams of perchloric acid, HClO 4 , are contained in 37.6 g of 75 wt.% aqueous perchloric acid? How many grams of water are in the same solution? ( 2 pts ) 3. A reliable assay shows that the ATP (Adenosine triphosphate) content of a certain cell type is 111 μ mol/100 mL. You developed a new assay which gave the following values
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for replicate analyses: 117, 119, 111, 115, and 120 μ mol/100 mL.Can you be 95% confident that your result agrees with the known value? ( 3 pts ) 4. Potassium can be determined by flame photometry using lithium as an internal standard. The following data were obtained for standard solutions of KCl containing a constant
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Assignment1 - Analytical Methods (CHEM 207) Assignment 1:...

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