Calculate the grams of solute needed to prepare a 5.0 L solution of 0.10 M CaCl2?

Question

Calculate the grams of solute needed to prepare a 5.0 L solution of 0.10 M CaCl2?

Answer 1

no. of moles= concentration(moles/L) x volume (L)

                  = 0.1 moles/L x 5.0L

                  = 0.5 moles

no. of moles = mass (g)/ molar mass (g/moles)

           mass = no. of moles x molar mass

                    = 0.5 moles x (40.08 + 2 x 35.45) moles/ g

                    = 0.5 x 110.98 g

                    = 44.49 g