Calculate the concentration of KIO3(aq) present at the beginning of a reaction when 2.00 mL of 0.020 M KIO3(aq) is mixed with 8.00 mL of other solutions so the initial volume for the reacting mixture is 10.00 mL.

To calculate the concentration of KIO3(aq) present at the beginning of the reaction, you need to use the principle of dilution. Dilution involves mixing a concentrated solution with a solvent or another solution to reduce its concentration.

In this case, you have 2.00 mL of a 0.020 M KIO3(aq) solution and added 8.00 mL of other solutions to make the total volume of the mixture 10.00 mL.

To calculate the concentration, you can use the formula for dilution:

C1V1 = C2V2

Where:
C1 = initial concentration of the KIO3(aq) solution
V1 = initial volume of the KIO3(aq) solution
C2 = final concentration of the KIO3(aq) solution
V2 = final volume of the mixture

Plugging in the known values:

C1 = 0.020 M (concentration of the KIO3(aq) solution)
V1 = 2.00 mL (initial volume of the KIO3(aq) solution)
C2 = ?
V2 = 10.00 mL (final volume of the mixture)

Solving for C2:

0.020 M * 2.00 mL = C2 * 10.00 mL

0.04 = C2 * 10.00

C2 = 0.04 / 10.00

C2 = 0.004 M

Therefore, the concentration of KIO3(aq) present at the beginning of the reaction is 0.004 M.

To calculate the concentration of KIO3(aq) at the beginning of the reaction, we need to use the principle of dilution.

The formula for dilution is:

C1V1 = C2V2

where:
C1 = initial concentration of the solution before dilution
V1 = initial volume of the solution before dilution
C2 = final concentration of the solution after dilution
V2 = final volume of the solution after dilution

Given:
C1 = 0.020 M (concentration of KIO3(aq) before dilution)
V1 = 2.00 mL (initial volume of KIO3(aq))
V2 = 10.00 mL (final volume of the reacting mixture)

Let's calculate C2, the final concentration after mixing:

C1V1 = C2V2
(0.020 M)(2.00 mL) = C2(10.00 mL)

C2 = (0.020 M)(2.00 mL) / (10.00 mL)
C2 = 0.004 M

Therefore, the concentration of KIO3(aq) at the beginning of the reaction is 0.004 M.

This is just another dilution problem.

millimoles KIO3 initially (and finally) = mL x M = ?

Then final concn = mmols/mL = ?mmols from above/10 mL = ?