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Question: 1 an unknown solution containing iron at a concentration between...

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1. An unknown solution containing iron at a concentration between 10 and 50 mg/L is now to be analyzed. 25 mL of this unknown solution is diluted to 250 mL with the appropriate reagents to form the ferrous - phenanthroline complex. The diluted solution has an absorption of 0.603. What is the concentration in (mg/L) of ferrous ion in the diluted solution?

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