12 - 1/12/2012 1 Titrant-Analyte Relationships at...

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Unformatted text preview: 1/12/2012 1 Titrant-Analyte Relationships at Equivalence point 1/12/2012 © J. Garcia 2011 19 x HA + y BOH = H 2 O + B-A At equivalence point: Molar approach: moles A = moles B * ( x / y ) Equivalents approach: equiv. A = equiv. B Some Useful Relationships 1/12/2012 © J. Garcia 2011 20 Calculating Molarity of Standard Solutions - 1 1/12/2012 7:34 AM J. Garcia 2012 21 Describe the preparation of 5.0000 L of 0.1000 M Na 2 CO 3 (105.99 g/mol) from the primary standard solid. Dissolving 53.00 g of Na 2 CO 3 in water and diluting to 5.000 L Calculating Molarity of Standard Solutions - 2 1/12/2012 7:34 AM J. Garcia 2012 22 A standard 0.0100 M solution of Na + is required for calibrating a flame photometric method for determining the element. Describe how 500.0 mL of this solution can be prepared from primary standard sodium carbonate? Dissolving 0.265 g of Na 2 CO 3 in water and diluting to 500 mL 1/12/2012 2 Calculating Molarity of Standard Solutions - 3 1/12/2012 7:34 AM J. Garcia 2012 23 A 50.00 mL volume of HCl solution required 29.71 mL of 0.01963 M Ba(OH)2 to reach an end point with bromocresol green indicator. Calculate the molarity of HCl. 0.0233 M Calculating Molarity of Standard Solutions - 4 1/12/2012 7:34 AM J. Garcia 2012 24 Titration of 0.2121 g of pure Na 2 C 2 O 4 (134.00 g/mol) required 43.31 mL of KMnO 4 . What is the molarity of the KMnO 4 solution?...
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12 - 1/12/2012 1 Titrant-Analyte Relationships at...

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