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Gurmeet Singh posted an Question
October 08, 2020 • 21:02 pm 30 points
  • IIT JAM
  • Geology (GG)

I99 x.4. calculate feo (t) and fe,o.(t) for a rock having 9.15% feo and 3.47 % fe,o ns. lo calculate feo (t), keep the feo wt.% as it is, convert the fe,o, wt.%

I99 x.4. Calculate FeO (T) and Fe,O.(T) for a rock having 9.15% FeO and 3.47 % Fe,O ns. lo calculate FeO (T), keep the FeO wt.% as it is, convert the Fe,O, wt.% into FeO wt.%, and then add the two. i.e., FeO (T) = 9.15 + (3.47 x 0.8998) = 12.27 wt.%. To calculate Fe,O, (T), keep the Fe,O, wt.% as is, convert the FeO wt.% into Fe,O, wt.%, and then add the two. i.e., Fe,O, (T) = 3.47 + (9.15 x 1.1113) = 13.63 wt.%. Thus, FeO (T) and Fe,O, (T) for the same rock have different values. Also, both values are different from the simple sum of FeO% and Fe,O,%, which is 12.62 wt.9%. nhaca nile the maximum number of phases in a 2 (two) component geological system

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    Rahul kumar best-answer

    To calculate FeO(T), keep the FeO wt.% as is, convert the Fe2O3 wt.% into FeO wt.%, and then add the two. Normalised molecular wt of Fe2O3 on one Fe-atom basis = Mol wt of Fe2O3 / 2 = 159.68/2 = 79.84 Factor for converting Fe2O3 to FeO = Mol wt of FeO / Normalised Mol wt of Fe2O3 = 71.84 / 79.84 = 0.8998 i.e.,FeO(T)=9.15+(3.47 x 0.8998)=12.27 wt.%. To calculate Fe2O3 (T), keep the Fe2O3 wt.% as is, convert the FeO wt.% into Fe2O3 wt.%, and then add the two. Factor for converting FeO to Fe2O3 = Normalised mol wt of Fe2O3 / Mol wt of FeO = 79.84 / 71.84 = 1.1113 i.e.,Fe2O3(T)=3.47+(9.15x1.1113)=13.64wt.%.

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