Question

A laboratory experiment requires 2.25 L of a 1.0 M solution of phosphoric acid (H3PO4), but the only available H3PO4 is a 9.0 M stock solution. How could you prepare the solution needed for the lab experiment? Show all the work used to find your answer.

Answer 1

Use the formula (M1)(V1)=(M2)(V2).
M1=9.0 M
V1 = ? (we are trying to find out how much of it to use)
M2 = 1.0 M
V2 = 2.25 L
so
(9.0 M)(V1)=(1.0 M)(2.25 L)
(V1)=(1.0 M)(2.25 L)/(9.0 M)
V1=0.25 L
get it?

Answer 2

So 0.25 L would be the answer?

Answer 3

Yes.

Answer 4

Thank You (: