The forensic technician at a crime scene has just prepared a luminol stock solution by adding 20.0 g of luminol into a total volume of 75.0 mL of H2O. What is the molarity of the stock solution of luminol? Express your answer with the appropriate units. • View Available Hint(s) HÀ ? molarity of luminol solution = Value Units Part B Before investigating the scene, the technician must dilute the luminol solution to a concentration of 2.00x10-2 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? Express your answer with the appropriate units.

Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter14: Equilibria In Acid-base Solutions
Section: Chapter Questions
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Please answer question 1 Part A and B

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
Part A
The forensic technician at a crime scene has just prepared a luminol stock solution by adding 20.0 g of luminol into a
total volume of 75.0 mL of H2 O.
diluted 10,000 times. A basic solution of luminol is
often sprayed onto surfaces that are suspected of
containing minute amounts of blood.
What is the molarity of the stock solution of luminol?
Express your answer with the appropriate units.
Luminol has a molecular weight of 177 g/mol.
• View Available Hint(s)
µA
?
molarity of luminol solution =
Value
Units
Part B
Before investigating the scene, the technician must dilute the luminol solution to a concentration of 2.00x10-2 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?
Express your answer with the appropriate units.
View Available Hint(s)
HÅ
Value
Units
moles of luminol =
Transcribed Image Text: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 Part A The forensic technician at a crime scene has just prepared a luminol stock solution by adding 20.0 g of luminol into a total volume of 75.0 mL of H2 O. diluted 10,000 times. A basic solution of luminol is often sprayed onto surfaces that are suspected of containing minute amounts of blood. What is the molarity of the stock solution of luminol? Express your answer with the appropriate units. Luminol has a molecular weight of 177 g/mol. • View Available Hint(s) µA ? molarity of luminol solution = Value Units Part B Before investigating the scene, the technician must dilute the luminol solution to a concentration of 2.00x10-2 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? Express your answer with the appropriate units. View Available Hint(s) HÅ Value Units moles of luminol =
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