Dr. Bob

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INTRODUCTION:
This report discusses an experiment to study the percent mass of iron determined by the concentration of a colored iron solution from the absorbance of the spectrometer. This lab is designed to determine the content of iron in cereal; often food products list iron and many of the other contents ingredients as a percentage. The box of Kix cereal has the iron content as 43%.

• Dr. Bob -

Phenanthroline (C12H8N2) was added to the colorless prepared solution and a phenanthroline-iron (II) complex was formed. The absorbance of the resulting colored solution was measured on the spectrophotometer and the percent iron was read from a graph that had been prepared previously from standard solutions of iron. 4The Fe (II) concentration was determined spectrophotometrically with 1, lO-phenanthroline, this equation for the iron phenanthroline: 2Fe3+ + 2NH2OH + 2OH- ----> 2Fe2+ + N2 + 4H2O

• Dr. Bob -

INTRODUCTION:
This report discusses an experiment to study the percent mass of iron determined by the concentration of a colored iron solution from the absorbance ofa instead of the the spectrometer. This lab is designed to determine the content of iron in cereal; often food products list iron and many of the other contentsomit contents ingredients as a percentage. The box of Kix cereal has liststhe iron content as 43%.

Phenanthroline (C12H8N2) was added to the colorless prepared solution and a phenanthroline-iron (II) complex was formed. The absorbance of the resulting colored solution was measured on the spectrophotometer and the percent iron was read from a graph that had been prepared previously from standard solutions of iron. 4Is the number 4 a reference or it doesn't belong there.The Fe (II) concentration was determined spectrophotometrically with 1,omit space lO-phenanthroline according to the following equation:, this equation for the iron phenanthroline: 2Fe3+ + 2NH2OH + 2OH- ----> 2Fe2+ + N2 + 4H2O

I think it reads ok now.

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