home > q&a board > chemistry > topic: concentration question, please help!

Q BgQuestion:

Pupil
Karma Points: 50
Respect (83%):
posted by  ItxguyI on 9/1/2008 1:21:27 PM  |  status: Live  

concentration question, please help!

Course Textbook Chapter Problem
N/A N/A N/A N/A
Question Details:
Concentrated H2SO4  is 96% by weight H2SO4  and has a density of 1.84gm/mL.  Calculate the volume of concentrated H2SO4 acid required to make 150mL of 4M  H2SO4.

AAnswers:

Answer Question
(Cramster SME)
Moderator
posted by Werner on 9/2/2008 4:57:06 AM  |  status: Live
Asker's Rating: Lifesaver   
ItxguyI's comment:
"thank you"
Response Details:
 Given that
 The % of H2SO4  = 96 %
   Density of H2SO4  = 1.84 g/ml
   ∴ Molarity of concentrated H2SO4 = (% * density*1000)/ ( Molar mass * 100)
                                                          = ( 96 *1.84g/mL * 1000) / ( 98 g/mol * 100)
                                                          = 18.0 M
   The volume of diluted H2SO4 = 150 mL
   The molarity of diluted H2SO4 = 4 M
   The volume of 18 M  H2SO4  required to prepare 150 mL of 4M  H2SO4 = (150 mL*4M) / 18
                                                                                                                     = 33.33 mL
Answer Question
Ask New Question

Join Cramster's Community

Cramster.com brings together students, educators and subject enthusiasts in an online study community. With around-the-clock expert help and a community of over 100,000 knowledgeable members, you can find the help you need, whenever you need it. Join for free today » How Cramster is different than tutoring »

Need Help In

Useful Links