Question

Attempt 1 Question 11 of 14 > You want to prepare a solution with a concentration of 200.0 PM from a stock solution with a concentration of 500.0 mM. At your disposal you have 5 mL and 10-ml transfer pipets and volumetric flasks of sizes 100, 250, 500, and 1000 mL. Which of the following serial dilutions will give you the 200.0 M solution? Produces a 200.0 M solution Does not produce a 200.0 M solution Dilute 10.00 mL of the stock solution up to 1000.0 mL. Then, dilute 10.00 mL of the resulting solution up to 250,0 m. Dilute 5.00 mL of the stock solution up to 250,0 mL. Then, dilute 10.00 mL of the resulting solution up to 500.0 mL. Dilute 5.00 mL of the stock solution up to 100.0 mL. Then, dilute 10.00 mL of the resulting solution up to 1000.0 ml. Dilute 5.00 mL of the stock solution up to 500.0 mL. Then, dilute 10.00 mL of the resulting solution up to 250.0 mL. Dilute 10.00 mL of the stock solution up to 100.0 mL. Then, dilute 5.00 mL of the resulting solution up to 1000.0 mL Answer Bank

Answer 1

Following dilutions will give you 200 $\b\mu$ M solution:

1) Dilute the 5.00 mL of the stock solution up to 250.0 mL.

Then dilute 10.00mL of the resulting solution up to 500.0 mL.

2) Dilute the 5.00 mL of the stock solution upto 500.0 mL.

Then dilute the 10.00mL of the resulting solution upto 250.0 mL.

3) Dilute the 10.00mL of stock solution upto 1000.0 mL.

Then dilute 10.00 mL of the resulting solution upto 250.0 mL.

Following dilutions will not give you 200 $\b\mu$ M solution:

4) Dilute the 5.00 mL of stock solution upto 100.0 mL.

Then dilute 10.00 mL of the resulting solution upto 1000.0 mL.

5) Dilute 10.00 mL of the stock solution upto 100.0 mL.

Then dilute 5.00 mL of the resulting solution upto 1000.0 mL.