What do the
Roman Numerals mean?
The use of Roman numerals in compounds is based on the
indication of the oxidation number (as a Roman Numeral) of each
of the major elements in the compound, e.g. iron(III) chloride.
There is no space between the element name and the oxidation
with Oxygen - Iron Oxide Reaction
are chemical compounds composed of iron and oxygen. There are at least
sixteen iron oxides and oxyhydroxides which have a variety of uses ranging
from pigments, cosmetics, paints and in construction. When heated, iron
reacts with oxygen to form a mixture of iron(II) and iron(III) oxides. The
black powder known as wustite, also known as ferrous oxide is Iron(II) oxide
(FeO). Iron(II) oxide should not be confused with rust, which usually
consists of hydrated iron(III) oxide (ferric oxide). Strong heating is
required to make iron powder burn in oxygen. The reaction creates a black
solid and produces yellow showery sparks.
Iron + Oxygen
—> Iron(II) oxide, Iron(III) oxide
Iron Sulfur Reaction
- Iron Sulfide
The exothermic reaction of two elements, iron and sulfur,
form the compound, iron sulfide. Iron(II) sulfide or ferrous
sulfide is a chemical compound with the formula FeS. Heating the
two elements produces an orange glow and iron(II) sulfide is
produced. Ferrous sulfate is mainly used as a a reducing agent,
mostly for the reduction of chromate in cement. FeS can be
obtained by the heating of iron and sulfur:
Fe + S --> FeS
Pyrite is the classic
"Fool's Gold" and is used in jewelry under the trade name "marcasite".
Powdered iron sulfide will ignite spontaneously in air. Iron
reacts with dilute sulphuric acid to form iron sulphate and
Iron + Sulphuric acid
—> Iron Sulphate + Hydrogen
Iron Hydrochloric Acid reaction
Iron sulfide reacts with hydrochloric acid, releasing the
pungent hydrogen sulfide.
FeS + 2 HCl → FeCl2 +
Iron reacts with
dilute hydrochloric acid to form iron chloride and hydrogen gas.
Iron + Hydrochloric
acid —> Iron Chloride + Hydrogen
and Water Reaction
Iron has virtually has no reaction with cold water.
However, when both water and oxygen are present (moist air),
iron corrodes. Its silvery colour changes to a reddish-brown,
because hydrated oxides are formed. It does react with steam to
give iron oxide and hydrogen gas.
Iron + Steam —>
Iron(II) Iron(III) oxide
Some examples of a chemical reaction include most commonly burning, fermentation,
tarnishing and rusting. There are several different types of Chemical reaction
which have been detailed below:
article for additional facts and information providing
the different types of reactions, examples of reaction
and the Rate of a Chemical Reaction.