What is an advantage of performing a series of dilutions vs. a simple dilution?
What is an advantage of performing a series of dilutions vs. a simple dilution?
A solution to be tested by AAS is prepared by performing two dilutions in series: First. 0.10 mL of the starting solution is diluted to 10.0 mL. Second, 1.0 mL of the solution resulting from the first dilution is diluted to 100.0 mL. This solution is then tested by AAS and found to contain 3.4 ppm Cd^2 + ion. What was the Cd^2 + ion concentration (in ppm and Molarity) in the starting solution?
What is the final dilution of a sample after 4 successive 1:10 dilutions? what is the dilution factor?
What is the final dilution of a sample after 3 successive 1:10 dilutions and two 1:100 dilutions
lete this table if 10-fold dilutions are performed instead of 2-fold dilutions. Cuvette Concentration Dilution fronm 6) Compl Fold Dilution original 0 1M 10 1:10 100 4
Two parallel dilution series were made from the same original sample. The plates with sample volumes of 10- mL from e ach dilution series yielded 144 and 93 colonies. Suggest reasonable sources of error. What are the only circumstances that would correctly produce countable plates from two different dilutions?
dilutions dilutions What are the resulting dilutions? Notice units of measurement. a) b) c) 500 L of serum is diluted to 2.0 mL 50 uL of whole blood is pipetted into 0.95 mL of diluent 500 mL of liquid K is added to 4.5 L of water 7. If 10 uL of urine is added to 90 uL of water, and the resulting solution is brought to a final volume of 0.50 mL with water, what is the final dilution...
12. Given a series of 4 dilutions, each 1/5, what is the concentration in tube No. 3 if the original concentration was 100 mg/dL? 13. A 1/2, fourfold serial dilution was performed. The original concentration of the analyte was 1200 μg/dL. What is the concentration of the analyte in the final tube? 7. Calculate the true analyte value given the following information: Analyte diluted using 10 μL into 90 μL diluent; Diluted analyte value = 85 mg/dL.
how do I find molarity of these dilutions? Dilution. Molarity (dilutions) 2:11 4:11 6:11 8:11 10:11
You carry out a serial dilution of a bacterial culture, using dilutions of ⅕, ⅕, 1/100, and 1/10. Then you plate 100 µl of the final dilution and the next day observe 200 colonies on your plate. What was the concentration of the original culture? (5 pts)
Differentiate between serial dilution, a simple dilution and a compound dilution