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-   -   Class is now in session!!! (http://www.fiestafan.com/forums/showthread.php?t=11173)

kirbysprite 07-21-2008 08:35 PM
Class is now in session!!!
 
Any questions? Please feel free to ask by raising your hand.

I'm bored...

Spirit 07-21-2008 08:38 PM
http://i298.photobucket.com/albums/m...nd_raising.jpg

A_Forever 07-21-2008 08:39 PM
http://i266.photobucket.com/albums/i...ver_L/FAIL.jpg

kirbysprite 07-21-2008 08:40 PM
Yes, Spirit?

No, A_Forever... you now have detention!!

Spirit 07-21-2008 08:42 PM
Whatcha doin?

A_Forever 07-21-2008 08:43 PM
Someone thats the same age as me or younger can not talk down to me or tell me what to do. kthxbai

kirbysprite 07-21-2008 08:43 PM
Don't mind what I'm doing, just get back to work.

A_For, I looked at your bday and I'm older than you...

A_Forever 07-21-2008 08:46 PM
Can't be that much older :3

You posted two threads about "graduating" >_> You mentioned moving onto high school in one...

Spirit 07-21-2008 08:47 PM
Quote:
Originally Posted by kirbysprite (Post 193765)
Don't mind what I'm doing, just get back to work.
I dont wanna. :nahnah:

kirbysprite 07-21-2008 08:47 PM
I guess I have to say this...

by 1 month. HA! DETENTION!!!





EDIT:
Quote:
Originally Posted by Spirit (Post 193771)
I dont wanna. :nahnah:
Why not.

A_Forever 07-21-2008 08:48 PM
You're the same age as me. No talking down to me or telling me what to do.

Spirit 07-21-2008 08:48 PM
Cuz....

kirbysprite 07-21-2008 08:50 PM
Quote:
Originally Posted by A_Forever (Post 193777)
You're the same age as me. No talking down to me or telling me what to do.
Yeah but I'm still older than you.

Quote:
Originally Posted by Spirit (Post 193778)
Cuz....
You better get back to work BEFORE I WHIP YOU!!!!!

Yeah I'm strict...

Pebbles 07-21-2008 08:51 PM
...lol.

A_Forever 07-21-2008 08:52 PM
Same age though.

I could say more, but it might be over the line /coughcough

kirbysprite 07-21-2008 08:53 PM
I wanna see this... Go over the line.... DO IT!!!! YOUR TEACHER COMMANDS YOU!!!

...

nvm...

Spirit 07-21-2008 08:54 PM
Ummm.... yeah, I'm outta this one.

kthxbai. <--- did I do that right?

Ralath 07-21-2008 08:55 PM
Whipping Spirit is not allowed.

kirbysprite 07-21-2008 08:56 PM
What are you Ralath, the principle?

Fine then, Spirit, just get back to work... do your times tables...

Maki 07-21-2008 09:03 PM
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.)

kirbysprite 07-21-2008 09:13 PM
Quote:
Originally Posted by Maki (Post 193826)
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...

Hyper 07-21-2008 09:16 PM
Quote:
Originally Posted by Spirit (Post 193760)
LMAO.

Quote:
Originally Posted by A_Forever (Post 193761)
LOOOOOOOOOOOOL. QFT.

Maki 07-21-2008 09:21 PM
Quote:
Originally Posted by kirbysprite (Post 193853)
This isn't science it's math. Get that out of your system...
:hulksmash: it got maths in it!
Like.. balancing the equations you need to know your 1,2 and 3s!

A_Forever 07-21-2008 09:22 PM
Math and science go hand-in-hand.

kirbysprite 07-21-2008 09:23 PM
Yeah they do...

PoisoN 07-21-2008 09:34 PM
Quote:
Originally Posted by A_Forever (Post 193871)
Math and science go hand-in-hand.
depends wut science Biology usualy duznt deal with math

Ralath 07-21-2008 09:36 PM
eccchhhhhhh!!! Is this AP Chem? Dx

Here's what I did.

Quote:
Originally Posted by Maki (Post 193826)

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.

http://img.photobucket.com/albums/v30/Ralath/chem.jpg
:3?

kirbysprite 07-21-2008 09:38 PM
Oh balancing equations? I hated that...

PoisoN 07-21-2008 09:38 PM
balancing equations isnt hard :zzz:

kirbysprite 07-21-2008 09:40 PM
Quote:
Originally Posted by PoisoN (Post 193894)
balancing equations isnt hard :zzz:
For me it was...

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

Sinus_infection 07-21-2008 09:41 PM
Quote:
Originally Posted by Maki (Post 193826)
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.)
theoratically...mathematically....scientifically speaking......:zzz::nahnah:the whats a what goes to the doohicky and the coombuster thing soes 3 times and the final answer is*drum roll plz*!!!!!!!!:zzz::zzz::zzz:

Maki 07-22-2008 04:12 AM
*drum rolls*...?

Ralath 07-22-2008 05:19 AM
for...?

I solved the problem for you already (I think).... Dx

lamchopz 07-22-2008 02:51 PM
Quote:
Originally Posted by Ralath (Post 193887)
eccchhhhhhh!!! Is this AP Chem? Dx

Here's what I did.



:3?
Brings me back to high school chemistry. :smarty:

I think Ralath got the products. I disagree slightly on the balanced equation:

H2SO4 (l) + 2NaHCO3 (s) -> Na2SO4 + 2H2O + 2CO2

(remember to reduce the coefficients to the simplest ratio)

Why can't we have a maths lesson? It's easier. :laugh:

Hyper 07-22-2008 03:15 PM
Quote:
Originally Posted by lamchopz (Post 194781)
H2SO4 (l) + 2NaHCO3 (s) -> Na2SO4 + 2H2O + 2CO2

(remember to reduce the coefficients to the simplest ratio)
Owned. :smarty:

Ralath 07-22-2008 06:51 PM
Actually. I did see that.

But then I was having problems finding enough oxygens on both sides.

So... yeah. Dx

I was too excited to actually figure that out. Couldn't figure out what to do with the carbons for a long time...

So I just left it like it is.

But doesn't change part B.

lamchopz 07-23-2008 02:26 AM
The oxidation number of each element hasn't changed so I'm guessing you used trials and errors.

What I did was first balance the sodium, then the hydrogen and finally the oxygen (consequently the carbon).

Part b is easy once you get the balanced equation.

Ralath 07-23-2008 03:20 AM
hrm. I can't remember what I did... lol..

Oh no wait. I know. I stuck in the 9 in front after I figured out the 9 moles. And then I just forgot to reduce. xD

Hessah 07-23-2008 03:32 AM
-throws a paper plane-

This room is full of chemistry nerds!!!!!


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