The obsorbance of a cationic iron(II) sample solution was measured in a spectrop

Question

The obsorbance of a cationic iron(II) sample solution was measured in a spectrophotometer, but the instrument returned an error because the absorbance was too high. The sample was Dan diluted by using a peptide to take 100.0 uL of the sample and injecting it into a cuvette already containing 2.00 mL of water (total volume is 2.00mL+100.0 uL) The absorbance value of the diluted solution corresponded to a concentration of 7.11× 10^-6 M.
The absorbance of a cationic iron(lI) sample solution was measured in a spectrophotome and injecting it into a cuvette already containing 2.00 mL of water (total volume is 2.00 n solution? Express the concentration to three significant figures with the appropriate units. Hints original concentration of Fe2+-1 Value Units Submit My Answers Give Up

Explanation / Answer

Since the dilution time is 20

2ml = 2000ul

So 2000/100= 20 times so the concentration will also be multiplied by 20 times hence concentration will be

= 20 *7.11*10^-6

=1.422* 10^ -4 M

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