[xitenshiix]

So when iron undergoes oxidation and forms iron oxide is there a mass change? If so is it decreasing and or increasing and why?

- I think it when iron undergoes oxidation and forms iron oixde it is heavier because essencially your adding oxygen to the iron. But I dont think that's the correct answer and there isnt enough context for it to recieve full credit.

So if anyone could explain this then that'd be great  

[RyanJones]

- I think it when iron undergoes oxidation and forms iron oixde it is heavier because essencially your adding oxygen to the iron. But I dont think that's the correct answer and there isnt enough context for it to recieve full credit.

So if anyone could explain this then that'd be great  

You are correct, the mass is greater bue to the addition of oxygen though I fail to see what this has too do with Oxidation :S

Its mass is greater because you not only have 2 Iron's in there but also three Oxygen's so..
M_r(2Fe) = 111.690
M_r(Fe₂O₃) = 159.688

See you can see your self its bigger :-)

Cheers,

Ryan Jones

[Borek]

That's correct.

You may add information about different iron oxides. You may also add information about the mass deficit due to E=mc², although unfortunately most teachers have no idea that it is true and you may end fighting instead of getting credits.

Edit: seems Ryan was slightly faster

[RyanJones]

That's correct.

You may add information about different iron oxides. You may also add information about the mass deficit due to E=mc², although unfortunately most teachers have no idea that it is true and you may end fighting instead of getting credits.

Good point although physics is not always a chemistry teachers best friend as you have said.

I'm not shure what else you could add too it to show the answrers though - did yo use numbers? Numbers are always good to add to an answer as confirmations or proofs :-)

Cheers,

Ryan Jones

[xitenshiix]

Thank you so much ^^ yea im not sure if i want to end up fighting with a teacher as scary as mine .   I just want to confirm if my answer was right and some more elaboration on it. (I love this site!)

ALSO if someone could explain this:

We had to do a lab where we took Steel wool and added vinigar to it. Stuffed it in a flask and sealed it with a balloon. Then we waited to see what happened.

Observation: The balloon slowly started to be sucked into the flask (i know the reason with air pressure and all) Mist started to form around the glass I dont know the reasont for this to occur. I thought it might be because there is a reaction taking place but that gives me no idea as to why it mists. So if someone coul answer this also.... that'd help me a lot

But thank you RyanJones and Borek!!  :Peace:

[RyanJones]

Thank you so much ^^ yea im not sure if i want to end up fighting with a teacher as scary as mine .   I just want to confirm if my answer was right and some more elaboration on it. (I love this site!)

ALSO if someone could explain this:

We had to do a lab where we took Steel wool and added vinigar to it. Stuffed it in a flask and sealed it with a balloon. Then we waited to see what happened.

Observation: The balloon slowly started to be sucked into the flask (i know the reason with air pressure and all) Mist started to form around the glass I dont know the reasont for this to occur. I thought it might be because there is a reaction taking place but that gives me no idea as to why it mists. So if someone coul answer this also.... that'd help me a lot

But thank you RyanJones and Borek!!  :Peace:

The mist is a product of the reaction (Water?) it forms because it condenses on contact with the glass :-)

Cheers,

Ryan Jones