you wish to make a 0.392 m perchloric acid solution from a stock solution of 6.00 m perchloric acid. how much concentrated acid must you add to obtain a total volume of 50.0 ml of the dilute solution?



Answer :

Given, 0.392 m Perchloric acid

Total volume of dilute solution 50.0mL

To solve this use the formula for dilution calculations, which is C1V1 = C2V2,

where the stock solution's concentration is C1,

for example.

The volume you must remove from the stock solution is V1.

C2 is the concentration of the target solution

V2 is the concentration of the target solution

Step1 Starting with this formula, we rearrange the variables to isolate V1 in order to solve for it, as it is the  volume we are adding to the solution to get the desired concentration and volume

V1 = (C2V2) / C2

Step 2 Plug in the values and solve

V1 = (0.392 M • 0.005 L) / 6   (Note 50 mL is converted to 0.05 L in order to have consistent units as M which is mol / L)

=0.0003266 L or 0.326 mL

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