Sorry about that
The chemical 5-amino-2,3-dihydro-1,4-phthalazinedione, better known as luminol, is used by forensic scientists in analyzing crime scenes for the presence of washed-away blood. Luminol is so sensitive that it can detect blood that has been diluted 10,000 times. A basic solution of luminol is often sprayed onto surfaces that are suspected of containing minute amounts of blood.
Luminol has a molecular weight of 177g/mol
The forensic technician at a crime scene has just prepared a luminol stock solution by adding 14.0 of luminol into a total volume of 75.0 mL of H2O.
1. What is the molarity of the stock solution of luminol?
ANSWER:molarity of luminol solution =1.05 M
2.Before investigating the scene, the technician must dilute the luminol solution to a concentration of 6.00×10−2 . 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: moles of luminol =0.120
3.What volume of the stock solution (Part A) would contain the number of moles present in the diluted solution (Part B)?
Answer: needs to be in mL and i cant figure it out. Can someone please help
4 answers
answers of
a. 0.753M
b. 0.120 mol
c. dun no
its 159 ml
11 answers