Math Practice

Question 1

Simple Dilution- If there’s a ratio of 1:15, what does that mean?

Answer 1

1 unit volume of solute (the material to be diluted) + 14 unit volumes of the solvent.

Question 2

Calculate the volume in mL of 50X TE Buffer required to make 1.5 L of 1X TE Buffer. Record the correct amount.

Answer 2

30

Question 3

Calculate the volume in mL of 25X TAE Buffer required to make 5.0 L of 1X TAE Buffer. Record the correct amount.

Answer 3

200

Question 4

Calculate the volume in mL of a 10.5 mg/mL tetracycline stock solution required to make 525 mL LB with a final concentration of tetracycline at 2.75 mg/mL. Record the correct amount, rounded to one decimal place.

Answer 4

137.5

Question 5

Calculate the volume in mL of a 1.5 M solution of NaOH stock solution required to make 275 mL of 50.0 mM NaOH? Record the correct amount, rounded to one decimal place.

Answer 5

9.2