# Chemistry

Ammonia has the formula NH3. Household ammonia is a dilute aqueous solution of NH3 . Aqueous ammonia is a base that can neutralize acids.

If 18.4mL of 0.800 M HCl solution are needed to neutralize 5.00 mL of a household ammonia solution, what is the molar concentration of the ammonia?

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1. Moles HCl=MolesAmmonia
Molarity*Volume=
.8*.0184= ?? Moles

Molar concentrationAmmonia = above moles/.005

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bobpursley
2. Are you saying that the molar concentration is .005

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3. Nevermind I figured it out with your help. The answer was 2.94. Thank you so much!

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4. Do you think you know how to figure out this one:

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?

3.What volume of the stock solution (Part A) would contain the number of moles present in the diluted solution (Part B)?

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5. I've responded to your multiple post multiple times.

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