Question

The formula of haematite is ________.

Answer 1

• Haematite is an iron oxide compound.
• It is derived from the Greek word "blood" in allusion to its red colour
• It is widely found in rocks and soils.
• Most haematite is sedimentary in origin.

The chemical formula of Haematite,

Iron has $+2$ charge that is ferrous and with$+3$ charge is ferric.

Valency of $Fe=3$

While valency of oxide$O^{2-}=2$

By applying the crisscross method The formula will be${\mathrm{Fe}}_2{\mathrm{O}}_3$

The formula of haematite is ${\mathrm{Fe}}_2{\mathrm{O}}_3$.