What is the molarity of the stock solution of luminol? Express your answer with

Question

What is the molarity of the stock solution of luminol? Express your answer with the appropriate units. Before investigating the scene the technician must dilute the luminol solution to a concentration of 6 00 Times 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? Express your answer with the appropriate units. What volume of the stock solution (Part A) would contain the number of moles present in the diluted solution (Part B)?

Explanation / Answer

Given that

; Part A answer is 1.05M

Part A = 1.05 M

Part B:

Number of moles = molarity * volume in L

= 6.00*10^-2 moles / l * 2.00 L

= 0.12 Moles

Part C:
M1V1=M2V2
(1.05 M)(x L)=(6.0*10^-2 M)(2.00L)

x=0.114 L OR 114 mL

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