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Old 07-21-2008, 09:13 PM   #21
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Originally Posted by Maki View Post
Eww! This reminds me of school.
T_T: End of the school holidays as of yesterday~
Starting school in 1 hour and 45 minutes *sniffles*

I HAVE A QUESTION!

A 500mL bottle of concentrated sulfuric acid (18molL-1) was dropped in a laboratory accident. Solid sodium hydrogen carbonate (NaHCO3) was used to neutralize the spilled acid.

a) Justify the choice of the solid sodium hydrogen carbonate to clean up the spill. Include relavent equaltions(s).

b) Calculate the minimum mass of sodium hydrogen carbonate needed to neutralise the spilled acid completely.


Good luck guys!

(HINT: question a is worth 4 marks and question b is worth 3.)
This isn't science it's math. Get that out of your system...
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Old 07-21-2008, 09:16 PM   #22
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Originally Posted by A_Forever View Post
LOOOOOOOOOOOOL. QFT.
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Old 07-21-2008, 09:21 PM   #23
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Originally Posted by kirbysprite View Post
This isn't science it's math. Get that out of your system...
it got maths in it!
Like.. balancing the equations you need to know your 1,2 and 3s!
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Old 07-21-2008, 09:22 PM   #24
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Math and science go hand-in-hand.
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Old 07-21-2008, 09:23 PM   #25
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Yeah they do...
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Old 07-21-2008, 09:34 PM   #26
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Originally Posted by A_Forever View Post
Math and science go hand-in-hand.
depends wut science Biology usualy duznt deal with math
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Old 07-21-2008, 09:36 PM   #27
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eccchhhhhhh!!! Is this AP Chem? Dx

Here's what I did.
Originally Posted by Maki View Post

A 500mL bottle of concentrated sulfuric acid (18molL-1) was dropped in a laboratory accident. Solid sodium hydrogen carbonate (NaHCO3) was used to neutralize the spilled acid.

a) Justify the choice of the solid sodium hydrogen carbonate to clean up the spill. Include relevant equations(s).

H2SO4+NaHCO3=CO2+H2O+NaSO4

500ml of H2SO4 (sulfuric acid) with 18molL-1 is 9 mols.

Balancing the rest of the equation gives you:

9(H2SO4)+18(NaHCO3)=18(CO2)+9(H2O)+9(Na2SO4)

Your products are then CO2 (harmless), H2O (even more harmless), and Na2SO4 (a precipitate).


b) Calculate the minimum mass of sodium hydrogen carbonate needed to neutralise the spilled acid completely.
:3?
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Old 07-21-2008, 09:38 PM   #28
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Oh balancing equations? I hated that...
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Old 07-21-2008, 09:38 PM   #29
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balancing equations isnt hard
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Old 07-21-2008, 09:40 PM   #30
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Originally Posted by PoisoN View Post
balancing equations isnt hard
For me it was...

I used something called the EBA or something... I hate trial and error...
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