Class is now in session!!!

[Ralath]

eccchhhhhhh!!! Is this AP Chem? Dx

Here's what I did.

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?

[kirbysprite]

Oh balancing equations? I hated that...

[PoisoN]

balancing equations isnt hard

[kirbysprite]

balancing equations isnt hard

For me it was...

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

[lamchopz]

eccchhhhhhh!!! Is this AP Chem? Dx

Here's what I did.



:3?

Brings me back to high school chemistry.

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.

[Hyper]

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

(remember to reduce the coefficients to the simplest ratio)

Owned.

[Ralath]

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]

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]

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]

-throws a paper plane-

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