1.What is the concentration of sodium ions when 35.0 g of sodium phosphate, Na3PO4, is dissolved in 500. mL of solution? Include the dissociation equation for sodium phosphate.

2.What volume of a 5.00 mol/L stock solution is needed to make 2.00 L of a 0.125 mol/L solution?

3.Find the new concentration when 225 mL of a 3.00 mol/L solution has 575 mL of water added to it.

4.What volume of water must be added to 250.0 mL of a 0.650 mol/L calcium chloride solution to produce a 0.430 mol/L solution?

5.What is the new concentration if 35 mL of 0.15 mol/L iron (II) nitrate is mixed with 72 mL of a 0.60 mol/L of the same substance?