Test3-1 - 3 The solubility product of calcium fluoride is and its molar mass is 78.08g/mol What is the solubility of calcium fluoride in g/L 4 The

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Up: Back to the Chemistry 2000 test index Chemistry 2000, Section A Spring 1996 Test 3 All questions are equally weighted. 1. Lactic acid is a monoprotic acid with a of 3.86 and a molar mass of 74.079g/mol. What is the pH of a solution made by dissolving 50g of lactic acid in 1L of water? 2. The single dissociable proton of benzoic acid (molar mass 122.123g/mol) has a of 4.2. Benzoic acid and sodium benzoate (the sodium salt of the conjugate base, molar mass 144.11g/mol) are both solids at room temperature. What masses of benzoic acid and of sodium benzoate would you have to dissolve in 1L of water to obtain a pH4.5 buffer with a total concentration (acid + conjugate base) of 0.3mol/L?
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Unformatted text preview: 3. The solubility product of calcium fluoride is and its molar mass is 78.08g/mol. What is the solubility of calcium fluoride in g/L? 4. The equilibrium constant for the process is at physiological temperature (310K). If 10g of lactose (molar mass 342.299g/mol) is dissolved in 100mL of water, what are the equilibrium concentrations of glucose, galactose and lactose? 5. 10g of iron (specific heat capacity 0.444JK g ) at 300 C is plunged into a large quantity of water at its boiling point. How much water evaporates? The heat of vaporization of water is 40.79kJ/mol. Marc Roussel Wed Nov 6 07:35:17 MST 1996...
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This note was uploaded on 03/03/2012 for the course CHEM 2000 taught by Professor Roussel during the Fall '06 term at Lethbridge College.

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