What volume of a 2.5 M stock solution of acetic acid is required to prepare 100.0 milliliters of a .50 M acetic acid solution?

1 Answer
Aug 22, 2016

Answer:

#20. "milliliters"# of acetic acid is required

Explanation:

Whenever you are dealing with a dilution, (going from a higher concentration to a lower concentration), you can use the equation below:
slideplayer.com

Let's determine our known and unknown variables:

#color(blue)("Knowns:"#

#color(orange)("Unknowns:"#

  • Initial Volume

Next, we rearrange the equation to solve for #V_1# by dividing by #M_1# on both sides of the equation:

#V_1=(M_2xxV_2)/M_1#

Plug in the known values and solve for your unknown:
#V_1=(0.50cancel"M"xx100.0mL)/(2.5cancel"M")#

Therefore,

#V_1 = 20. mL#