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• • <br />Project: Cripple Creek Hydrogeochemistry CAUSTIC SODA TITRATION <br />Task: Neutralization of Pyrite Oxidation Product <br />T: 604-2244331 F: 604 2240540 Inlo(cDmooscilec-corn -, www.vizons61eccom <br />Vizan S(iTec Inc. 3650 Wes6rook Moll Vancouver, BC Canada Y65 21-2 `, Z O N <br />vS C I T E C <br />Test 4: Titrations Using 0.10N NaOH Solution <br />Initial (cold) pH was recorded then the solution was warmed to 20°C before commencing titrations <br />1) Sample A (Volcanic), cold pH =2.66 <br />0.10N NaOH <br />ml Target pH <br />0.0 2.47 <br />34.0 3.00 <br />64.0 3.50 <br />68.1 4.00 <br />71.5 4.50 <br />_ 76.0 5.00 <br />77.6 5.50 <br />79.1 6.00 <br />80.3 6.50 <br />81 7 _ <br />7.00 <br />U 7 50 <br />A - Volcanic <br />8-00 <br />7-00 - - --- 600 <br />5.00 <br />4 00 <br />3 00 -- -- - <br />2 00 - <br />1 00 <br />0 00 <br />00 200 400 60.0 80.0 100-0 <br />NaOH (mL) <br />Adrian Brown Consultants, Inc. <br />E <br />Date: 4/8/2008 <br />Page 8-1