EXAMPLE: What mass of potassium chloride would be needed to prepare 250.0 mL of a 0.500 M solution? The following equations are needed for some of the problems in this Tutorial. Na2SO4 (aq) What volume of 1.50 M barium chloride solution is needed to form 0.525 g of silver chloride?
"Sodium and chloride ions....." We write the equation for the formation of BaSO_4(s) as: BaCl_2(aq) + Na_2SO_4(aq) rarr BaSO_4(s)darr + 2NaCl(aq) Alternatively, we could write the net ionic equation: Ba^(2+) + SO_4^(2-) rarr BaSO_4(s)darr In other words, the Na^+, and Cl^- ions are along for the ride.