6. Iron(II) ion salts, such as FESO, · 7H,0, react with the organic compound ortho-phenanthromne phen) to form red coordination compounds with formulas such as Fe(phen),,SO4. Such compounds have an analytical wavelength of 510 nm. (1) A standard solution containing Fe(phen), SO, was made by dissolving 0.0139 g of FeSO4 · 7H;O, with a molar mass of 278.05 g mol1 in 500.0 mL of water containing excess phen. The solution has a %T of 36.5% at 510 nm. A 500.0-mL solution with unknown Fe(phen),,SO4 concentration has a %T of 64.3% at 510 nm. What is the molar concentration of Fe(phen),,SO4 in the unknown solution?
6. Iron(II) ion salts, such as FESO, · 7H,0, react with the organic compound ortho-phenanthromne phen) to form red coordination compounds with formulas such as Fe(phen),,SO4. Such compounds have an analytical wavelength of 510 nm. (1) A standard solution containing Fe(phen), SO, was made by dissolving 0.0139 g of FeSO4 · 7H;O, with a molar mass of 278.05 g mol1 in 500.0 mL of water containing excess phen. The solution has a %T of 36.5% at 510 nm. A 500.0-mL solution with unknown Fe(phen),,SO4 concentration has a %T of 64.3% at 510 nm. What is the molar concentration of Fe(phen),,SO4 in the unknown solution?
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Transcribed Image Text:6. Tron(11) ion salts, such as FeSO, 7H,O, react with the organic compound ortho-phenanthroline
(phen) to form red coordination compounds with formulas such as Fe(phen),SO4. Such compounds
have an analytical wavelength of 510 nm.
(1) A standard solution containing Fe(phen),SO, was made by dissolving 0.0139 g of FeSO4 · H20,
with a molar mass of 278.05 g mol-1 in 500.0 mL of water containing excess phen. The solution
has a %T of 36.5% at 510 nm. A 500.0-mL solution with unknown Fe(phen),,SO4 concentration has
a %T of 64.3% at 510 nm. What is the molar concentration of Fe(phen),SO4 in the unknown
solution?
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