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Organic : TITRATION Lab
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 Message 14 of 21 in Discussion 
From: MSN Nickname·Steve·  in response to Message 13Sent: 1/17/2008 4:06 AM
Let M1 and V1 be for the ascorbic acid solution and M2 and V2 be for the iodine solution.
 
M1  =  0.002839 M from your calculation.
V1  =  10.0 mL according to the procedure.
 
M2  =  molarity of the iodine solution to solve for.
V2  =  volume of iodine solution used to titrate the ascorbic acid solution  =  12.35 mL.
 
 
That's it!  The formula M1V1 = M2V2 works because the reaction between ascorbic acid and iodine is one-to-one.  Volume in mL times molarity = mmoles, so this formula is actually "mmoles of ascorbic acid = mmoles of iodine" if mL volumes are used for V1 and V2.  You do not have to convert the volumes to liters here.


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     re: TITRATION Lab   MSN Nickname·Steve·  1/17/2008 4:17 AM