... each ion Multiply the moles of each ion by that ion’s charge to find the total moles of charge Since sodium ions have a +1 charge, the total moles of charge equals the moles of sodium ions Solution: ... (L) of solution Solution: a) Mdil = molarity of the diluted solution Mconc = molarity of the concentrated solution Vdil = volume of the diluted solution Vconc = volume of the concentrated solution. .. HNO3 in L of solution Convert mass of HNO3 to moles to obtain moles/L, molarity Solution:  mL   1.41 g solution  a) Mass (g) of L of solution = 1 L solution  3    = 1410 g solution 