Help on part "c":
The forensic technician at a crime scene has just prepared a luminol stock solution by adding 19.0g of luminol into a total volume of 75.0mL of H2O.
a)What is the molarity of the stock solution of luminol?
answer I got: molarity of luminol solution = 1.43M
b)Before investigating the scene, the technician must dilute the luminol solution to a concentration of 6.00×10−2 M. The diluted solution is then placed in a spray bottle for application on the desired surfaces.
How many moles of luminol are present in 2.00 L of the diluted spray?
answer I got: moles of luminol =
0.120mol
I cannot get the correct answer for "c"...I have tried: 172mL,11.9mL, and 1.19*10^4mL. The only other possibility that I can come up with is: 83.9mL. Would this one be correct?...Or...am I still completely out to lunch???
C)- What volume of the stock solution (Part A) would contain the number of moles present in the diluted solution (Part B)?
Express your answer in milliliters.
2 answers