Can you show me how to calculate this equation? What is the concentration of phosphoric acid solution of 30.0ml of a 0.2M of Potassium hydroxide is used to neutralize. The volume of acid is 20.0ml.
H3PO4 + 3NaOH ==> K3PO4 + 3H2O
mols KOH = M x L = ?
For every 3 mol KOH you use 1 mol H3PO4 or for every 1 mol KOH you use 1/3 mol H3PO4.
Then M H3PO43 = mols H3PO4/L H3PO4 used.