ANALYSIS OF MINERAL HARDNESS IN WATER

ANALYSIS OF MINERAL HARDNESS IN WATER -...

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ANALYSIS OF MINERAL HARDNESS IN WATER ABSTRACT: IN THIS LABORATORY EXPERIMENT, THE HARDESS RESULTING FROM THE  METALLIC ELEMENTS IN WATER WAS DETERMINED. WATER IN THE UNITED STATES  CAN   BE   DEFINED   AS   ‘HARD’   OR   ‘SOFT’,   DEPENDING   ON   THE   AMOUNT   OF  CARBONATES, SULFATES, ALKALAI EARTH AND/OR IRON SALTS. WATERS HIGH IN  METALLIC   ELEMENTS   MAY   OR   MAY   NOT   HAVE   A   HIGH   PH   LEVEL.   FOR   THIS  EXPERIMENT, EDTA WAS USED TO TITRATE THE SOLUTION. THE MEAN VOLUMES OF  EDTA USED WAS 40.64 ML AND 25.86 ML. THE CALCULATED CALCIUM CARBONATE  WAS 526.0 PPM. 
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RESULTS Weight of CaCO 3  = 0.4085 grams Weight of NH 4 Cl = 6.7459 grams Moles of CaCO 3 Molecular Mass of CaCO 3  = 100.8 grams Moles of CaCO 3 : (0.4085 g ) / (100.8 g /mole) = 0.0041 moles CaCO 3 Concentration of CaCO 3  in 500 mL of water   M = (moles) / (Volume, L)  (0.0041 moles) / (500 mL  / 1000 mL )    ٭ 1 L = 0.0082 M CaCO 3  in 0.5 L water Standardization of EDTA Solution Volume of solution = 50 mL Determination One
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This note was uploaded on 09/27/2010 for the course CHEM 393 taught by Professor Anderson during the Spring '04 term at Ramapo.

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ANALYSIS OF MINERAL HARDNESS IN WATER -...

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