Describe how 500ml of 0.1M solution of NaOH can be prepared from 2.0M NaOH?

500 mL x 0.1M = ?mL x 2.0M

Solve for mL, measure that quantity of 2.0M NaOH and make up to 500 mL with DI water.

25ml

To prepare a 500ml solution of 0.1M NaOH from a 2.0M NaOH stock solution, you will need to perform a dilution. Dilution involves adding a solvent (usually distilled water) to the stock solution to obtain a desired concentration.

To calculate the volume of stock solution needed, you can use the formula:

C1V1 = C2V2

Where:
C1 = Concentration of the stock solution (2.0M)
V1 = Volume of the stock solution used (unknown)
C2 = Concentration of the desired solution (0.1M)
V2 = Volume of the desired solution (500ml)

Plugging in the given values, we have:

2.0M × V1 = 0.1M × 500ml

Rearranging the formula, we get:

V1 = (0.1M × 500ml) / 2.0M

V1 = 25ml

Therefore, you will need to measure 25ml of the 2.0M NaOH stock solution and then add distilled water to make up a total volume of 500ml. This will give you a 500ml solution with a concentration of 0.1M NaOH.