How many moles of Na+ ions are in 20 mL of 0.40 M Na3PO4?

1 Answer

jeew-m's profile pic

jeew-m | College Teacher | (Level 1) Educator Emeritus

Posted on

`Na_3PO_4` will ionized as follows in an aqueous solution.

`Na_3PO_4 rarr 3Na^++PO_4^(3-)`

As we can see from the balanced equation one `Na_3PO_4` will give us three `Na^+` moles.

Amount of `Na_3PO_4 = 0.4/1000xx20 = 0.008mol`


Mole ratio

`Na_3PO_4:Na^+ = 1:3`


Amount of `Na^+` `= 0.008xx3 = 0.024mols`


So we have 0.024 moles of `Na^+` ions.