Posted by **Jessi** on Tuesday, April 14, 2009 at 8:14pm.

How many milliliters of a 2000.0 mg/dl stock solution are needed to prepare 100.0 ml of a 150.0 mg/dl working solution?

- Chemistry -
**GK**, Wednesday, April 15, 2009 at 2:21pm
Use the "dilution formula":

V1C1 = V2C2

V1, C1 = initial volume and concentration

V2, C2 = final volume and concentration

Your unknown is V1. Substitute the other which are given and solve for V1.

- Chemistry -
**GK**, Wednesday, April 15, 2009 at 2:24pm
Use the "dilution formula":

V1C1 = V2C2

V1, C1 = initial volume and concentration

V2, C2 = final volume and concentration

Your unknown is V1. Substitute the other which are given and solve for V1.

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