Homework Help: Lab Math-Dilutions

Posted by Morgan on Monday, January 16, 2012 at 11:45pm.

You have 1.50mL of a urine specimen. The assay you are about to perform requires a 1/25 dilution of this specimen. How much water must be added to the specimen to achieve this dilution?

I know this is simple but I am not coming up with the right answer.

Thank you to whoever can help!!!

Lab Math-Dilutions - DrBob222, Tuesday, January 17, 2012 at 2:17pm
Look at iat this way.
1 mL sample + 24 mL H2O
2 mL sample + 48 mL H2O
So 1.5 + (24+12) mL H2O

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