Preparing 1L cell culture media with 10X salt and 10% FBS

[Simon777]

Homework Statement

You need to prepare medium for your culture cells. Your liquid salt solution is 10X concentration, you need to dilute to 1X for use. You need to add 100% fetal bovine serum for a final concentration of 10%. How would you make up 1 liter of this culture media using water as your solvent?

Homework Equations

possibly c1v1=c2v2

The Attempt at a Solution

Liquid Salt
(10)(v1)=(1)(1L)
v1=0.1L

Fetal Bovine Serum
(1)(v1)= (.1)(1L)
v1=.1L

1 Liter - 0.1L - 0.1L = 0.8L of Water

Add 0.1L of the 10X liquid salt to 0.1L of the 100% serum, dilute with water to 1 L.

 

[chemisttree]

So how is this a molarity calculation?