Iron Lab Report
Aim: To Find and test the Iron content in different food sources
INTRODUCTION:
A Redox titration was used in order to perform this experiment. Reduction/oxidation (redox) process occurs when electrons are transferred from a donor species (the reducing agent) to another acceptor species (the oxidizing agent). It happens between an analyte and a titrant. A redox titration is done just as a normal titration is done, however instead of titrating an acid against a base, an oxidizing agent is titrated against a reducing agent and the equivalence point is reached when the reducing agent is completely oxidized by the oxidizing agent. (Chang, 2011). An indicator is used just as in an acid-base titration, although in this experiment because of its self-indicating property KMnO4 the titrant, it is also used as indicate when the equivalence point is reached as it is titrated with Fe2+
Iron is the most abundant metal in the Earth’s crust after Aluminum. It is found in many ores such as hematite, siderite and magnetite.Iron is a basic part of many proteins and enzymes that maintain good health. In humans, iron is a vital constituent of proteins involved in oxygen transport. It is also essential for the regulation of cell growth and differentiation. A deficiency of iron limits oxygen delivery to cells, resulting in fatigue, poor work performance, and decreased immunity. On the other hand, excess amounts of iron can result in toxicity and even death.
Almost two-thirds of iron in the body is found in haemoglobin, the protein in red blood cells that carries oxygen to tissues. Lesser amounts of iron are found in myoglobin, a protein that helps supply oxygen to muscle, and in enzymes that assist biochemical reactions. Iron is also found in proteins that store iron for future needs and that transport iron in blood. Iron stores are regulated by intestinal iron absorption.
There are two forms of dietary iron: haeme and nonhaeme. Haeme iron is derived from haemoglobin, the protein
INTRODUCTION:
A Redox titration was used in order to perform this experiment. Reduction/oxidation (redox) process occurs when electrons are transferred from a donor species (the reducing agent) to another acceptor species (the oxidizing agent). It happens between an analyte and a titrant. A redox titration is done just as a normal titration is done, however instead of titrating an acid against a base, an oxidizing agent is titrated against a reducing agent and the equivalence point is reached when the reducing agent is completely oxidized by the oxidizing agent. (Chang, 2011). An indicator is used just as in an acid-base titration, although in this experiment because of its self-indicating property KMnO4 the titrant, it is also used as indicate when the equivalence point is reached as it is titrated with Fe2+
Iron is the most abundant metal in the Earth’s crust after Aluminum. It is found in many ores such as hematite, siderite and magnetite.Iron is a basic part of many proteins and enzymes that maintain good health. In humans, iron is a vital constituent of proteins involved in oxygen transport. It is also essential for the regulation of cell growth and differentiation. A deficiency of iron limits oxygen delivery to cells, resulting in fatigue, poor work performance, and decreased immunity. On the other hand, excess amounts of iron can result in toxicity and even death.
Almost two-thirds of iron in the body is found in haemoglobin, the protein in red blood cells that carries oxygen to tissues. Lesser amounts of iron are found in myoglobin, a protein that helps supply oxygen to muscle, and in enzymes that assist biochemical reactions. Iron is also found in proteins that store iron for future needs and that transport iron in blood. Iron stores are regulated by intestinal iron absorption.
There are two forms of dietary iron: haeme and nonhaeme. Haeme iron is derived from haemoglobin, the protein
References: • Chang, R., & Overby, J. S. (2011). General chemistry: the essential concepts. New York, NY, McGraw-Hill. • Ironrichfood.org, (2011): Iron content of beef liver http://www.ironrichfood.org/iron-beef-liver/ (Accessed 20th march) • Mineral Information Institute, (2011) : The Role of Elements in Life Processes http://www.mii.org/periodic/LifeElement.html#fe (Accessed 24th Mar 2011)