Fe2O3, or rust, is iron oxide formed by a redox reaction of iron and oxygen in the presence of water. Iron is the reducing agent, as it gives up electrons, while oxygen is the oxidizing agent gaining electrons. Simply expressed, Fe plus H2O plus O2 yields Fe2O3.
The rusting of iron is an electromagnetic process that begins with the transfer of electrons from iron to oxygen. Iron becomes an ion the presence of moisture. This is the transition of solid Fe to aqueous Fe2+ and two electrons. The electrons then reduce the oxygen that is dissolved in the H2O, as O2 plus four electrons plus four naturally occurring H+ ions yield two H2O molecules. The Fe2+ ions from the iron oxidation then each react with two OH- ions in water to form Fe(OH)2. Following dehydration, Fe(OH)2 produces rust.Learn More
The chemical formula for rust is Fe2O3.nH2O. The overall chemical equation for the formulation of rust is iron + water + oxygen = rust. Fe(OH)3 dehydrates to produce Fe2O3.nH2O(s) or rust.Full Answer >
Chemical equations are illustrations of the reactants and products in a chemical reaction. Chemical equations are expressed as A + B -> C, where A and B are the reactants, and C is the product.Full Answer >
The equation for photosynthesis is 6H2O+6CO2 --> C6H12O6 +6O2. This entire equation is catalyzed by sunlight and produces glucose for the plant and oxygen for the atmosphere.Full Answer >
Phosphoric acid, or H3PO4, plus calcium hydroxide, or Ca(OH)2, react to form water and calcium phosphate. Water is H2O, and calcium phosphate is Ca3(PO4)2. Lab technicians need two moles, or parts, of phosphoric acid and three moles of calcium hydroxide to form six moles of water and one mole of calcium phosphate. The entire chemical equation is represented as: 2 H3PO4 + 3 Ca(OH)2 = 6 H2O + Ca3(PO4)2.Full Answer >