n this experiment, a stock solution of acetylsalicylic acid will be prepared by

Question

n this experiment, a stock solution of acetylsalicylic acid will be prepared by dissolving 0.450g of pure acetylsalicylic acid in NaOH solution and enough water to make 250.0ml of solution. Calculate the concentration of this solution. You will dilute the stock solution you prepare using iron (III) chloride solution to make the following dilution of the iron( lll) salicylate complex.

how do i calculate for the concentraion of Fe3+ x SA? PLease show me ONE calculation for dilution #2

#2                        3.00                                       100.0                                      ?
#3                         5.00                                      100.0                                      ?
#4                         7.00                                      100.0                                      ?

Explanation / Answer

SOLUTION:
ASA is 180.157 g/mol

0.450 g = 2.49 x 10^(-3) mol ASA

2.49 x 10^(-3) mol / 0.250 L = 9.99 x 10^(-3) mol/L

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