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A standard FAS solution is prepared by dissolving 0.1221 g of FAS (uncorrected mass) in water...

A standard FAS solution is prepared by dissolving 0.1221 g of FAS (uncorrected mass) in water in an amber bottle. The dry weight of the capped bottle is 256.77 g; the total weight of the bottle plus standard FAS solution is 750.13 g. Calculate the concentration of this solution in mg Fe/g soln. (Note that FAS has a density of 1.86 g/mL and contains 14.24087% Fe.) Then, a calibration standard test solution is made by dispensing 3.8514 g of the standard FAS solution into a 100.0 mL volumetric flask. It is buffered to pH 3.5, reduced with H2Q, complexed with phen, and diluted to the mark. Calculate the Fe concentration of this test solution in mg/L.

[Standard FAS solution: 0.0352617 mg Fe/g soln]

[Calibration standard test solution: 1.35806 mg Fe/L]

Please show how to get to the answers shown above.

Solutions

Expert Solution

Following is the Solution and calculation of the Part -(1) of the problem.

Part-(1): Q: " Calculate the concentration of this solution in mg Fe/ g soln. "

Calculated Answer:

Conc. of the Solution = 0.0352 mg Fe / g soln.

It has been calculated and proven that the given answer is correct. Following is the calculation in image format:

queen_honey_blossom answered 2 years ago
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