A .503 sample of limestone is dissoloved in acid and diluted to 2500 mL. A 25.0m

Question

A .503 sample of limestone is dissoloved in acid and diluted to 2500 mL. A 25.0mL portion is pipetted into a 100.mL flask along with buffer, reducing agentm and the phen reagent. This solution is placed into a 2.00 cm cell and the absorbance at 510 is .458 A reagent blank in the same cell has an absorbance of .023

The 2.00 cm cell is broken and replaced with a 1.00 cm cell. 1.002 g of standar iron wire is dissloved in acid and diluted to 1.000 L. A 1.00 mL portion is pipetted into a 100.0 mL flask along with the reagents before.  The solution has an absorbance of 0.784

Calculate the amount of iron in the limestone rock sample as mass%

Explanation / Answer

Answer : 5.765%

Solution :

According to Beer Lambert

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