Question

What volume of a 2.5 M stock solution of H3PO4 is needed to prepare 3.8 L of a 1.5 M H3PO4 solution?

Answer 1

\[M _{1}V _{1}=M _{2}V _{2}\]

Answer 2

add necessary amount of standard then dilute to desired volume.

Answer 3

(2.5 M) ?L = (1.5 M)(3.8L)

Answer 4

yep