Calculate the volume of .00500 M solution needed to make 10.00 ml of the following? .00400 M solution .00300 M solution

To solve these problems, we can use the dilution equation

#M_"conc"V_"conc" = M_"dil"V_"dil"#

where

• #M# is the molarity of the concentrated (#"conc"#) and dilute (#"dil"#) solutions

• #V# is the volume of the concentrated and dilute solutions

The volume needed for the first concentration (#0.00400M#) is

#V_"conc" = (M_"dil"V_"dil")/(M_"conc")#

#= ((0.00400cancel(M))(10.00color(white)(l)"mL"))/(0.00500cancel(M)) = color(red)(8.00# #color(red)("mL"#

and the second concentration (#0.00300M#):

#V_"conc" = ((0.00300cancel(M))(10.00color(white)(l)"mL"))/(0.00500cancel(M)) = color(blue)(6.00# #color(blue)("mL"#

Molarity x Volume (concentrate) = Molarity x Volume (diluted)

(0.005M)Vol Conc = (10ml)(0.004M)
=> Vol Concentrate = [(10ml)(0.004M)/(0.005M)] = 8 ml

Mixing => Transfer 8 ml of 0.005M concentrate into mixing container and dilute up to but not to exceed 10 ml total volume=> 0.004M Soln

(0.005M)Vol Conc = (10ml)(0.003M)
=> Vol Concentrate = [(10ml)(0.003M)/(0.005M)] = 6 ml

Mixing => Transfer 6 ml of 0.005M concentrate into mixing container and dilute up to but not to exceed 10 ml total volume=> 0.003M Soln