Question

Using the fact that at 0.10 M, the absorbance was 0.357; and at 0.20 M, the absorbance was 0.714, the absorptivity (slope) is

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(answer to 2 dec places). Using your absorptivity, if an absorption of 0.250 is measured, the concentration is

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M (answer to 2 dec places)

Answer 1

The answer is "3.57 and 0.07".

Step-by-step explanation:

Using the slop formula:

`=(n_2-n_1)/(n_2-n_1)\\\\ =(0.714-0.357)/(0.20-0.10) \\\\ = ABSORPTIVITY, \ \ a=3.57 \\\\A= a* b * c`

Given:

`A=0.250`

length path
`b=1`

from calibration it is found that

`a=3.57\\\\consentation \ c=(A)/(a* b) \\\\C=(0.250)/(3.57* 1)`

`=0.07 \ M`