The following calibration curve was made by spectrophotometric analysis of ferri

Question

The following calibration curve was made by spectrophotometric analysis of ferric thiocyanate solutions of known concentration. You are asked to analyze a Fe(SCN)^2+ solution with an unknown concentration. You measure an absorbance value of 0.530 for this solution, using the same instrument and temperature conditions as for the calibration curve. What is the Fe(SCN)^2+ concentration (in mol/L) of the unknown solution? Do not type the units in your answer. Count your "0"s carefully, as D2L will not accept scientific notation in your answer.

Explanation / Answer

The given callibration curve is for Absorbance vs Concentration of Fe(SCN)2+ .

Y axis is for absorbance and X axis is for Concentration; The relation between the A and C is given by

Y=4596X ; For Y= 0.530, X =0.53/4596 = 1.1532 *10-4 ; X= 1.1532 *10-4 is the concentration for given unknwon sample of Fe(SCN)2+.

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