04MANprepfe - Preparation of a Complex Iron Salt Revised PREPARATION OF A COMPLEX IRON SALT OBJECTIVES For you the student to write SAFETY

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Preparation of a Complex Iron Salt Revised 6/02/10 1 PREPARATION OF A COMPLEX IRON SALT OBJECTIVES For you, the student, to write…. SAFETY PRECAUTIONS Safety goggles, aprons, and gloves must be worn in lab at all times. Oxalate compounds are easily absorbed through the skin and can cause kidney damage. 6 M sulfuric acid is very corrosive and can cause severe burns. Wear gloves when handling these compounds and wash any affected areas thoroughly with cold water. 95% ethyl alcohol (ethanol) is flammable; extinguish all open flames in lab. INTRODUCTION Transition metal ions will react with charged or neutral ligands ( e.g. Cl or H 2 O) to form complex ions or neutral coordination compounds. Iron in the +3 oxidation state can form octahedral complexes with up to 6 unidentate ligands surrounding a central metal ion (Figure 1). The ligands act as Lewis bases, each donating a pair of electrons to the Fe 3+ ion. Oxalate ion, C 2 O 4 2– , is a bidentate ligand and takes up two positions in a coordination complex by donating a pair of electrons each from two of its oxygen atoms. Students will determine in a later experiment whether one, two or three oxalate ions coordinate to the Fe 3+ ion in the complex salt. The synthesis of the iron complex begins with Mohr's salt: Fe(NH 4 ) 2 (SO 4 ) 2 . 6H 2 O. The salt is dissolved in water and the solution is kept at a low pH by addition of sulfuric acid to prevent the
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Preparation of a Complex Iron Salt Revised 6/02/10 2 Fe L LL L L L 3+ Figure 1. Octahedral Fe 3+ complex surrounded by unidentate ligands, L (ligands can be charged like Cl or NO 2 , or neutral like H 2 O or NH 3 ).
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/23/2010 for the course CHEMISTRY Chem 1LC taught by Professor Dr.kimberlyedwards during the Fall '10 term at UC Irvine.

Page1 / 4

04MANprepfe - Preparation of a Complex Iron Salt Revised PREPARATION OF A COMPLEX IRON SALT OBJECTIVES For you the student to write SAFETY

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online