Question

What is the molarity of a solution made of 2.5 moles of `KNO_3` in 5 L of water?

Answer 1

`"Molarity"` `=` `0.50` `mol*L^-1`

Explanation:

`"Molarity"` `=` `("Moles of solute")/("Volume of solution (L)")`

`=` `(2.50*mol)/(5*L)` `=` `0.50` `mol*L^-1`.

The volume of the solution formed when such a quantity of potassium nitrate is dissolved in `5` `L` of solvent would remain at `5` `L`, or so close that the difference is negligible.