Question

4.00 ml of a 1.50e-3 m solution of crystal violet is mixed with 8.00 ml of water. what is the concentration of the resulting solution (in units of m)?

Answer 1

To find the concentration of the resulting solution, we need to calculate the number of moles of crystal violet in the final solution and divide by the total volume of the solution.

First, we can find the number of moles of crystal violet in the initial solution by multiplying the volume of the solution (4.00 mL) by the concentration (1.50e-3 M):

moles = (4.00 mL) * (1.50e-3 M) = 6.00e-4 moles

Next, we add 8.00 mL of water to the solution, so the total volume of the solution becomes 12.00 mL.

Then, we divide the number of moles by the total volume of the solution to find the concentration:

concentration = moles / volume = 6.00e-4 moles / 12.00 mL = 5.00e-5 M

So the concentration of the resulting solution is 5.00 x 10^-5 M (in units of Molarity)