Question

In the simulation below, you will be working with a 10.00 mL solution, which you will make up of the dye and the bleach. You will be using a 10 mL serological pipet to deliver the dye and a 1 mL syringe to deliver the bleach to a vial, which you will place into the spectrophotometer. You will have to ensure that the solution is mixed well throughout the experiment by means of a magnetic stirrer. You are given a dye, Yellow 6, whose concentration is 3.40 x 10^-5M and two choices of bleach solution: 0.090M and 0.180M.

in The stock solution of Yellow 6 is 3.40 E-5M. You have 2 available stock solutions of NaOCI (bleach): 0.180M and 0.090M. Calculate the initial concentrations of the dye and bleach in the 10.00 mL solution you are going to use to prepare a kinetic trace. (Please use 3 significant figures. Please use scientific notation: i.e. 0.000232 can be entered as 2.32E-4) Volume of dye used (mL) 9.70 Volume of bleach used (mL) 0.70 Conc. of bleach used (M) 0.180 Initial concentration of dye in solution Initial concentration of bleach in solution

1	Volume of dye
2	Original concentration of dye
3	Volume of bleach
4	Original concentration of bleach
5	Total volume of the solution (volume of dye +volume of bleach)
6	Final concentration of dye
7	Final concentration of bleach

Answer 1

volume of dye= 9.70mL concentration of dye = 3.40x10 to My volume of bleach=0.70mL concentration of bleach = 0.186 M Total Volume = 9.70+0.707 = 10.40 mL Concept: Onmixing moles of species will remain same. Mi Vi = Mg Vf Mi tinitial concentration vi tinitial volume Me final concentration uft final volume for dye: 3040x 16 x 9.70 = Mal0.40 + Mg = 3.17X10-5M for bleach: 0.180 x0.70 = Mg x 10.40 Mg = 0.012 M