dilute the concentration of 100mL of KIO3 from 0.5M to 0.0005M

the concentration is reduced by a factor of 1000, so the volume must increase by that factor. So, add water till the volume is 100L

To dilute the concentration of a solution, you need to add a solvent (usually water) to lower the concentration of the solute. In this case, you want to dilute 100 mL of a 0.5 M (molar) solution of KIO3 to a concentration of 0.0005 M.

Here's how you can calculate the required volume of the diluted solution:

1. Use the formula C1V1 = C2V2, where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.

2. Plug in the values into the formula:

C1 = 0.5 M
V1 = 100 mL (0.1 L)
C2 = 0.0005 M
V2 = ?

(0.5 M) * (0.1 L) = (0.0005 M) * V2

3. Rearrange the equation to solve for V2:

V2 = (0.5 M * 0.1 L) / (0.0005 M)

V2 = 100 L

So, you need to add water to the 100 mL (0.1 L) solution of KIO3 to make a total volume of 100 L in order to achieve a concentration of 0.0005 M.