-
Finished your HSC? Check out our University Discussion, Non-School forums or help out next year's HSC students! -
YOU can help the next generation of students in the community! Share your trial papers and notes on our Notes & Resources page
sulfurous acid exists? (1 Viewer)
- Thread starter YannY
- Start date
jcurry
Member
from what i gather about it, it is formed from sulfur dioxide dissolving in water
yet there has never been any solid evidence that this occurs
but if it does form from sulfur dioxide dissolving inwater than i suppose it could be in acid rain, or normal rain as its said to be a weak acid
idk thats about all i could find out about it, maybe someone else knows more about
hope i helped
yet there has never been any solid evidence that this occurs
but if it does form from sulfur dioxide dissolving inwater than i suppose it could be in acid rain, or normal rain as its said to be a weak acid
idk thats about all i could find out about it, maybe someone else knows more about
hope i helped
from conquering chemistry:
Sulfur dioxide reacts to form sulfurousacid :
SO2 + H2O -> H2SO3
In water droplets various other impurities in air catalyse the conversion of sulfurous acid to sulfuric acid:
2H2SO3 + O2 -> 2H2SO4 (with catalyst)
It's a bit vague, hope it help though.
Sulfur dioxide reacts to form sulfurousacid :
SO2 + H2O -> H2SO3
In water droplets various other impurities in air catalyse the conversion of sulfurous acid to sulfuric acid:
2H2SO3 + O2 -> 2H2SO4 (with catalyst)
It's a bit vague, hope it help though.
yorkstanham
Member
hey, yes sulfurous acid does occur in acid rain, however it is quickly reacted and forms sulfuric acid
First sulfur dioxide reacts with water to form sulfurous acid
<SUB><SUB>SO<SUB>2</SUB> + H<SUB>2</SUB>O + H<SUB>2</SUB>SO<SUB>3 </SUB>
</SUB></SUB>
Impurities in the rain droplets then catalase the reaction and allow oxygen to react with the sulfurous acid causing sulfuric acid
2H<SUB>2</SUB>SO<SUB>3 </SUB>+ O<SUB>2</SUB> + 2H<SUB>2</SUB>SO<SUB>4</SUB>
<SUB>This sulfuric acid then dissolves in the rain casuing it to be acidic
Hope that helps
</SUB>
First sulfur dioxide reacts with water to form sulfurous acid
<SUB><SUB>SO<SUB>2</SUB> + H<SUB>2</SUB>O + H<SUB>2</SUB>SO<SUB>3 </SUB>
</SUB></SUB>
Impurities in the rain droplets then catalase the reaction and allow oxygen to react with the sulfurous acid causing sulfuric acid
2H<SUB>2</SUB>SO<SUB>3 </SUB>+ O<SUB>2</SUB> + 2H<SUB>2</SUB>SO<SUB>4</SUB>
<SUB>This sulfuric acid then dissolves in the rain casuing it to be acidic
Hope that helps
</SUB>
jcurry
Member
oh kundalay said:
cool thanx
Tiffanys
Executed member
lol "It doesn't exist"???
Tiffanys
Executed member
Chemistry Contexts:
S + O2 --> SO2 (combustion)
SO2 + H2O --> H2SO3 sulfurous acid formation
Sulfur dioxide readily oxidised to give sulfur trioxide
2SO2 +O2 --> 2SO3
SO3 +H2O --> H2SO4 sulfuric acid formation
S + O2 --> SO2 (combustion)
SO2 + H2O --> H2SO3 sulfurous acid formation
Sulfur dioxide readily oxidised to give sulfur trioxide
2SO2 +O2 --> 2SO3
SO3 +H2O --> H2SO4 sulfuric acid formation
Tiffanys
Executed member
My point being it's the SO3 that forms H2SO4, NOT the H2SO3 + O2
Tiffanys
Executed member
Most sulfuric acid is manufactured, but it can also occur naturally. For example, most sulfur dioxide released into the earth’s atmosphere is oxidised and dissolved in water to form the sulfuric acid in acid rain. If the acid rain results from volcanic eruption it could be regarded as natural, but if acid rain results from smelting of sulfide ores, it could be regarded as manufactured.
Ed: from hsc online
Ed: from hsc online
Where i can't find it.
most sulfur dioxide released into the earth’s atmosphere is oxidised and dissolved in water to form the sulfuric acid
Your contradicting youself entirely:
"Apart from that, sulfuric acid is a constituent of acid rain, which is formed by atmospheric oxidation of sulfur dioxide in the presence of water, i.e., oxidation of sulfurous acid"
wiki
just give up u lose.
most sulfur dioxide released into the earth’s atmosphere is oxidised and dissolved in water to form the sulfuric acid
Your contradicting youself entirely:
"Apart from that, sulfuric acid is a constituent of acid rain, which is formed by atmospheric oxidation of sulfur dioxide in the presence of water, i.e., oxidation of sulfurous acid"
wiki
just give up u lose.
Tiffanys
Executed member
http://hsc.csu.edu.au/chemistry/core/acidic/chem933/933net.html
5th dotpoint in the left column. Tbh, I trust csu over wiki.
Sif I contradicted myself? The Sulfur dioxide is oxidised ie. becomes SO3. Sulfur Trioxde becomes aqueous, et voila, sulfuric acid.
5th dotpoint in the left column. Tbh, I trust csu over wiki.
Sif I contradicted myself? The Sulfur dioxide is oxidised ie. becomes SO3. Sulfur Trioxde becomes aqueous, et voila, sulfuric acid.
1. CSU IS TOTALLY SHIT.
2. Conquering chemistry roland smith also says same shit.
(more recent and better then contexts_
3. Gas reactions can also be done in aqeuous solutions.
4. I said BOTH ways work earlier if u didnt notice.
5. SO2 + O2 has a higher activation energy then in aqeuous solution.
Gaseous oxidation is not the only way it can form.
"Some sulfuric acid is formed directly in the water droplets"
http://www.elmhurst.edu/~chm/vchembook/190acidrain.html
" The oxidation process of aqueous sulfur dioxide by molecular oxygen relies on metal catalyst such as iron and manganese. This reaction is unlike other oxidation process, which occurs by hydrogen peroxide. It requires an additional formation of an intermediate (A-), for example peroxymonosulfurous acid ion. This formation is shown below.
HSO3 H2O2 -> A- +H2O A- +H -> H2SO4 "
http://www.geocities.com/capecanaveral/hall/9111/DOC.HTML
"In the eastern United States, the primary conversion of sulfur dioxide is through an aqueous phase reaction with hydrogen peroxide (H<SUB>2</SUB>O<SUB>2</SUB>) that exists in clouds...The result of these chemical reactions is the formation of acids in the atmosphere. These acids are, most notably, sulfuric acid (H<SUB>2</SUB>SO<SUB>4</SUN>) and nitric acid (HNO<SUB>3</SUB>). "</SUB>
<SUB>http://www.rpi.edu/dept/chem-eng/Biotech-Environ/Environmental/acidrain/acidrain.html</SUB>
<SUB></SUB>
"Sulphurous acid will oxidise to Sulphuric acid in the air[FONT=新細明體]；[/FONT]or some of the sulphur dioxide (SO2) emitted will react directly with oxygen radical in the air, oxidises to sulphur trioxide SO3, then this SO3 will react with the water molecules in the air forming sulphuric acid (H2SO4)."
http://www.greeneducation.org.hk/English/focus/acid_rain_eng.htm
Oh my god u lose.
2. Conquering chemistry roland smith also says same shit.
(more recent and better then contexts_
3. Gas reactions can also be done in aqeuous solutions.
4. I said BOTH ways work earlier if u didnt notice.
5. SO2 + O2 has a higher activation energy then in aqeuous solution.
Gaseous oxidation is not the only way it can form.
"Some sulfuric acid is formed directly in the water droplets"
http://www.elmhurst.edu/~chm/vchembook/190acidrain.html
" The oxidation process of aqueous sulfur dioxide by molecular oxygen relies on metal catalyst such as iron and manganese. This reaction is unlike other oxidation process, which occurs by hydrogen peroxide. It requires an additional formation of an intermediate (A-), for example peroxymonosulfurous acid ion. This formation is shown below.
HSO3 H2O2 -> A- +H2O A- +H -> H2SO4 "
http://www.geocities.com/capecanaveral/hall/9111/DOC.HTML
"In the eastern United States, the primary conversion of sulfur dioxide is through an aqueous phase reaction with hydrogen peroxide (H<SUB>2</SUB>O<SUB>2</SUB>) that exists in clouds...The result of these chemical reactions is the formation of acids in the atmosphere. These acids are, most notably, sulfuric acid (H<SUB>2</SUB>SO<SUB>4</SUN>) and nitric acid (HNO<SUB>3</SUB>). "</SUB>
<SUB>http://www.rpi.edu/dept/chem-eng/Biotech-Environ/Environmental/acidrain/acidrain.html</SUB>
<SUB></SUB>
"Sulphurous acid will oxidise to Sulphuric acid in the air[FONT=新細明體]；[/FONT]or some of the sulphur dioxide (SO2) emitted will react directly with oxygen radical in the air, oxidises to sulphur trioxide SO3, then this SO3 will react with the water molecules in the air forming sulphuric acid (H2SO4)."
http://www.greeneducation.org.hk/English/focus/acid_rain_eng.htm
Oh my god u lose.
Tiffanys
Executed member
Lol chill. I really cbf to read what you wrote and I'm sure you put a lot of effort into it. Good on you. I have the revised edition of Chemistry Contexts 2007, CSU says the same, so does my school notes and my Prior notes. It's up to your interpretation I guess, either way I'm sure we'd both be marked right for this particular question.
Tiffanys
Executed member
Lol tis cool, whilst not studying and bosing we've inadvertently gathered information from secondary sources about sulfuric acid and revised. =P