The oxide of titanium,TiO2 is used as a "whitener" in toothpaste.It is obtained from the ore iron (II) titanate,FeTiO3.What is the change,if any,in the oxidation number (oxidation state) of titanium in the reaction

Respuesta :

Answer:

There is no change in the oxidation number (oxidation state) of titanium in the reaction

Explanation:

TiO2

⇒ The oxidation number of O = -2

⇒  Since we have O2, this makes 2*-2 = -4

⇒ The oxation number of Ti and O2 together should be 0

   ⇒The oxidation number of Ti is +4

For FeTiO3, it's more complicate because Fe can have several oxidation numbers.

Since FeTiO3 has three  short metal–oxygen bonds in the octahedron  and three  long metal -oxygen bonds.

The valences, obtained from the bond lengths by the bond valence method, is  +2 anapproximately which can be rounded off to oxidation stated +4, respectively for Fe and Ti.

FeTiO3

⇒ The oxidation number of O = -2

  ⇒ We have O3 so this makes 3*-2 = -6

⇒Fe has an oxidation state of +2

⇒The oxidation state of Fe, Ti and O3 together should be 0

⇒Ti has an oxidation state of +4

This means Titanium doesn't change it's oxidation number.

There is no change in the oxidation number (oxidation state) of titanium in the reaction