Carbon Dioxide and Acid Rain (1 Viewer)

[serge]

Would dissolved carbon dioxide
in the form of H2CO3 (carbonic acid)
count as acid-raid

I know the effects of sulfur dioxide
and NOx gases, but was wondering if CO2
would have any effect?

By that i mean industrial sources of CO2
(not just breathing out)

cheers

 

[rama_v]

Yes, to the best of my knoweldge, thats still acid rain

 

[serge]

Yes, to the best of my knoweldge, thats still acid rain

yeh,
but it wouldnt have as serious effects
as NOx gases and sulfur dioxide right?

 

[rama_v]

yeh,
but it wouldnt have as serious effects
as NOx gases and sulfur dioxide right?

I dont think it would have very serious implications although if there was enoguh of it my guess is that it may start affecting river systems and buildings (at the very least u wouldnt want to pour coke on your car - think of it that way)...

EDIT: Now you've got me thinking. According to wikipedia, carbonic acid is not strong at all because it only ever exits as an equilibrium between water and CO2. So its not a major consideration in terms of acid rain...

http://en.wikipedia.org/wiki/Carbonic_acid

 

[serge]

thanks for clearing it all up

i'll just stick to the strong ones for deforestation etc.

 

[Dreamerish*~]

Unpolluted rain is slightly acidic due to dissolved CO₂. It's normal. You don't need to mention it when talking about acid rain because it isn't a pollutant.

 

[azza_3761]

Acid rain is usually refered to as rain with a pH less than 5. Since dissolved CO2 usually isn't in such high concentrations, dissolved CO2 does not classify rain to be acid rain.

 

[Haku]

the ph for normal rain has ph of 6right? slightly acidic

 

[Casmira]

oxides of nitrogen in the atmosphere, are they likely to cause smog or acid rain (of nitric acid)?

 

[serge]

oxides of nitrogen in the atmosphere, are they likely to cause smog or acid rain (of nitric acid)?

yes, very likely

2NO2 + H20 --> HNO3 + HNO2

2HNO2 + O2--> 2HNO3

sorry bout the lack of subscript

there are a few others using
ozone and NO but i forget them
(they've been posted in another thread)

 

[Haku]

NO + O2 --> NO2 + O
O2 + O --> O3

but at the same time it also destroys ozone

NO + O3 --> NO2 + O2

but the formation of ozone is faster than destroying the ozone, thus ozone is present in photochemical smog due to NO. Both are polluntants at the troposphere level.

O3 is highly reactive and an strong oxidising agent will oxidise metals and ...(dun know what else) it is also poisonous to humans at amount as low as 2ppm. and cause irritation to the eye and breathing problems

 

[serge]

it is also poisonous to humans at amount as low as 2ppm. and cause irritation to the eye and breathing problems

BTW- on poisonous forms of oxygen,
pure oxygen will eventually kill you

 

[Haku]

serge, u do shipwreck right?

for question 29 a) ii) for 2002 hsc

is the cathode equation Cu2+ + 2e- --> Cu E=-0.34
anode is Fe --> Fe2+ + 2e- E=-0.44

so the required initiation voltage is 0.78V. is the equations and the voltes for the half equations right? or does it need to be reversed for both?

 

[Haku]

BTW- on poisonous forms of oxygen,
pure oxygen will eventually kill you

i learnt that on braniac. but more O2 give u more energy and more brain power.

also in simpsons they teach you that O2 is addictive.

 

[serge]

serge, u do shipwreck right?

for question 29 a) ii) for 2002 hsc

is the cathode equation Cu2+ + 2e- --> Cu E=-0.34
anode is Fe --> Fe2+ + 2e- E=-0.44

so the required initiation voltage is 0.78V. is the equations and the voltes for the half equations right? or does it need to be reversed for both?

I havent got a reactivity sheet near me, but off the top of my head
that sounds pretty good, if you reverse both it wont make sense
because nothing will be oxidised

 

[serge]

i learnt that on braniac. but more O2 give u more energy and more brain power.

also in simpsons they teach you that O2 is addictive.

I learnt it from conquering chem I've been neglecting TV
after the physics exam it'll be back to normal

 

[Haku]

yea when i called the help line they told me to reverse it. i said "ok". but than i look back on it now it make no sense to reverse the thingy
...

 

[serge]

If corrosion is happening make sure it has a positive emf
because otherwise it wont be spontaneous...
hence it wont be corrosion

 

[Haku]

yea. so for that question if u reverse both anode and cathode it would be 0.44 and -0.34, so it will be positive...

 

[serge]

yea. so for that question if u reverse both anode and cathode it would be 0.44 and -0.34, so it will be positive...

yeh, but Fe's more reactive (even though it is possible for both
to be reversed) the more likely voltage will be .44 + .34= .078V