Stock Solution

If the stock solution had a concentration of 20mg/mL, what is the FINAL dilution for tube A in mg/mL?

Mathematical Equivalence

ON

If the stock solution had a concentration of 15mg/mL, what is the FINAL dilution for tube D in mg/mL?

Mathematical Equivalence

ON

If the stock solution had a concentration of 25ug/uL, what is the FINAL dilution for tube A in ug/uL?

Mathematical Equivalence

ON

If the stock solution had a concentration of 25ug/uL, what is the FINAL dilution for tube B in ug/uL?

Mathematical Equivalence

ON

If the stock solution had a concentration of 25ug/uL, what is the FINAL dilution for tube C in ug/uL?

Mathematical Equivalence

ON

What is a stock solution?

• A solution with a known concentration used to prepare other solutions

• A solution with an unknown concentration

• A solution that is always saturated

• A solution that is always diluted

Which of the following is a common use of stock solutions in laboratories?

• To prepare diluted solutions with precise concentrations

• To store chemicals for long periods

• To increase the concentration of a solution

• To neutralize acids

If you have a 1 M stock solution of NaCl, how would you prepare 100 mL of a 0.1 M NaCl solution?

• Dilute 10 mL of the stock solution to 100 mL with water

• Dilute 1 mL of the stock solution to 100 mL with water

• Dilute 100 mL of the stock solution to 1 L with water

• Dilute 50 mL of the stock solution to 100 mL with water

What is the formula to calculate the volume of stock solution needed to prepare a diluted solution?

Why is it important to label stock solutions clearly in a laboratory?

• To ensure the correct solution is used in experiments

• To prevent evaporation

• To increase the shelf life of the solution

• To make the solution more concentrated