Question

What is the concentration of nitrate ion in a solution that contains 0.900 M aluminum nitrate?

Answer 1

`2.7` moles of nitrate ions.

Explanation:

Aluminium nitrate is a molecule with a chemical formula of `Al(NO_3)_3`. So, in one mole of aluminium nitrate, there is one mole of aluminium ions, and three moles of nitrate ions.

And so, here we would have,

`0.9color(red)cancelcolor(black)("mol of" \ Al(NO_3)_3)*(3 \ "mol of" \ NO_3^-)/(1color(red)cancelcolor(black)("mol of" \ Al(NO_3)_3))=2.7 \ "mol of" \ Al(NO_3)_3`