12 in chromatographic equipment a solution containing 00392 m unknown sample and 00120m internal

Step 1: Understand the problem. We are given the initial concentrations and peak areas of an unk

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In chromatographic equipment, a solution containing 0.0392 M of an unknown sample and 0.0120 M of an internal standard gives peak areas of 456 and 420, respectively. To analyze, 10 mL of a 0.060 M internal standard was added to 10 mL of the unknown sample, and the mixture was diluted up to 25 mL. This mixture gave a chromatographic reading peak area of 493 for the unknown sample and a peak area of 520 for the standard. Find the concentration of the unknown sample. A. 0.06846 M B. 0.1712 M C. 0.06329 M D. 0.1904 M

          In chromatographic equipment, a solution containing 0.0392 M of an unknown sample and 0.0120 M of an internal standard gives peak areas of 456 and 420, respectively. To analyze, 10 mL of a 0.060 M internal standard was added to 10 mL of the unknown sample, and the mixture was diluted up to 25 mL. This mixture gave a chromatographic reading peak area of 493 for the unknown sample and a peak area of 520 for the standard. Find the concentration of the unknown sample.
A. 0.06846 M B. 0.1712 M C. 0.06329 M D. 0.1904 M

Added by Keith W.

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