Thread: Write and Balance equations...

Could someone please help me write and balance these equations:

Hydrogen and Potassium=Potassium hydride

Chlorine and hot Silicon=Silicon Tetrachloride

Sulphuric acid reacts with Calcium to form Calcium sulphate and hydrogen gas

Fe2 O3 + CO--->2Fe + CO2


Trying to figure them out and I haven't done Chemistry in a couple of years!
Thanks for ANY help

:wink:

Also I know these are easy equations.. I just want to make sure im doing them correct (i.e is the answer to the first: 2Na + H2 ---> 2NaH....... Oops ment to wirte K instead of Na!!)

write out your attempts first.
the first on is incorrect, clue,check you periodic table

Originally Posted by fizzlooney

write out your attempts first.
the first on is incorrect, clue,check you periodic table

I really thought the first was right. Whats the correct answer?

Is the answer to the second one: 2Cl2 + Si Cl4?

The first one looks right to me. Sodium is +1, hydride is -1, so I would guess 2Na + H2 -> 2NaH.

Edit: Woops, change Na to K. Same answer, though (2KH)

I'm reviewing this stuff for my chem class this semester so I'll give it a shot, I need the practise. Chances are I'll mess this up, but anyways...

Hydrogen and Potassium=Potassium hydride

H2 + 2K -> 2KH

Chlorine and hot Silicon=Silicon Tetrachloride

2Cl2 + Si -> SiCl4

Sulphuric acid reacts with Calcium to form Calcium sulphate and hydrogen gas

H2SO4 + Ca -> CaSO4 + H2

Thanks brushman for ur help :-D

Are these correct:

Hydrogen Sulphide burns in airto form water vapour and Sulphur:
H2S + O2 ----> S + H2O

Sodium Hydride reacts with water to form Sodium Hydroxide and Hydrogen gas:
NaH + H2O----> NaOH + H2

Hydrogen Sulphide burns in airto form water vapour and Sulphur:
H2S + O2 ----> S + H2O

I think that's good except it needs to be balanced. So something like

2H2S + O2 -> 2S + 2H2O

Sodium Hydride reacts with water to form Sodium Hydroxide and Hydrogen gas:
NaH + H2O----> NaOH + H2

Looks good to me.

Thanks a mill brushman!! :-D

I am not so knowledgeable about this matter. So i have to learn it. Thanks for the post.
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Can anyone tell me if this equation is balanced correctly?

2NH4 OH + 3H2 SO4 ----> (NH4)2 SO4 + 2H2O

Thanks :-D

Well, if you go element-by-element and count the number on each side of the reaction, you'll discover that your numbers for hydrogen and oxygen are off.

Originally Posted by Chemboy

Well, if you go element-by-element and count the number on each side of the reaction, you'll discover that your numbers for hydrogen and oxygen are off.

Ok What about this?
2NH4 OH + H2 SO4 ----> (NH4)2 SO4 + 2H2O

(This isn't homework... im in my 20's and trying to revive chemistry knowledge so the answer would be much appreciated if im wrong :-D )

that looks good to me.

Originally Posted by Chemboy

that looks good to me.

WooHoo... Thank you!!