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SO3 is dissolved in H2SO4 to form or fuming H2SO4. If SO3 dissolved directly in water, then a large amount of heat is evolved. This heat gives a dense form of minute particles of H2SO4. These particles do not easily condense down.

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11y ago
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12y ago

'Cause sulphur isn't soluble in water. To make sulphuric acid, you must vaporate solid sulphur to sulphur gas by burning it and put that steam into water. It won't make concentrate acid but boil it and you'll have concentrate sulphuric acid.

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12y ago

so3 is not dissolved in h2o because it is an exothermic reaction and gives explosion but when so3 is react with h2so4 then it gives h2s2o7

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13y ago

the particles in sulfur are too big to fit in a water particle and also sulfur has less density and gravity.

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Q: Why sulphur trioxide is not dissolved in water directly to get sulphur acid?
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What is the composition of Sulfuric Acid?

H2SO4 [water plus Sulphur Dioxide]. Correct me if I'm wrong but isn't it Sulphur Trioxide?


Is sulfur trioxide is ionic?

Sulfur trioxide is not ionic; it is covalently bonded. When dissolved in water, however, sulfur trioxide forms sulfuric acid, which is partially ionic: It dissociates into hydrogen ions and sulfate polyatomic cations.


What are the uses of sulfur trioxide?

Its primary use is in the Contact Process (making Sulphuric Acid). This can be done directly by reacting Sulphur Trioxide with Water to form dilute, but highly corrosive, Sulphuric Acid: SO3(g) + H2O(l) = H2SO4(aq) It can also be achieved indirectly by adding Sulphur Trioxide to Sulphuric Acid to form Disulphuric Acid (Pyrosulphuric Acid, Fuming Sulphuric Acid or Oleum) then Reacting Disulphuric Acid with Water to Form Concentrated Sulphuric Acid: SO3(g) + H2SO4(l) = H2S207(l) H2S2O7(l) + H20(l) = 2H2SO4(l)


What is compound form when sulfur trioxide dissolved in concentrated sulphuric acid?

When sulphur trioxide is dissolved in sulphuric acid the compound formed is oleum or fuming sulphuric acid. It is nsty stuff. !!!! However, it is part of the process inmanufacturing sulphuric acid. SO3 + H2SO4 = H2S2O7 This is then disolvedin water to make more sul[phuric acid. H2O + H2S2O7 = 2H2SO4 Notice ; we statred with one mole of H2SO4 , and the product is 2 moles of H2SO4. We have doubled to amount. NB The oleum is disolved into a large quantityt of water. NOT water is dissolbed in oleum. The reason being is if water was dissolved into oleum is would boil , and there by release fumes and particles of sulphuric acid into the environment. - Not a good idea. So the oleum is slowly dissolved intio water.


Is water a product or a reactant?

NO substance is classified as reactant or product individually.Reactant is a substance which undergoes chemical reaction to give a new product,which is called product.Example:-Water + Sulphur Trioxide --------> Sulphuric acidHere water and sulphur trioxide are reactants and sulphuric acid is the product.Water can be both a reactant and product.


Why are scrubbers used to reduce sulphur dioxide in the atmosphere?

Sulphur scrubbers on coal fired power plants use a multistage system:The stack gasses containing sulphur dioxide gas are passed over a catalytic bed with the addition of extra oxygen to convert the sulphur dioxide gas to sulphur trioxide gas.The stack gasses now containing sulphur trioxide gas are passed through a chamber containing water spray and the sulphur trioxide gas dissolves in the water producing highly concentrated sulphuric acid, which precipitates out of the stack gasses as a liquid.The concentrated sulphuric acid is concentrated more producing "Oleum" a very oily industrial grade of sulphuric acid. "Oleum" can often be sold to chemical companies with no further processing.If the market for "Oleum" does not offer enough demand, then it can be processed through additional steps to extract the dry sulphur as yellow crystals called "flowers of sulphur".


What does sulfuric acid combine with particles to form?

Sulphur is first oxidized to sulphur trioxide(SO3) and then it is passed through water to form sulphuric acid. To know further about the manufacturing of sulphuric acid, follow the link below.


Sources of sulfuric acid?

Sulfuric acid (sulphuric in the UK) is obtained from sulfur (sulphur in the UK), a yellow mineral found in large quantities in volcanic regions. First the sulfur is melted and burned to form sulfur dioxide gas. This is passed with further oxygen over a catalyst of Vanadium oxide to speed up the reaction whereby a gas called sulfur trioxide is formed. Sulfur trioxide will react directly with water to produce sulfuric acid but as the reaction is so violent, the sulfur trioxide is dissolved first in some already made sulphuric acid. The resulting oily, fuming, corrosive liquid is called 'fuming sulfuric acid' or 'oleum'. This oleum is then reacted with water to form a double quantity of sulfuric acid, one lot being product required and the other sent back to the stage in the process where the sulfur trioxide is re-dissolved in it.


Air is forced through the water to remove gases?

Water stripping can remove many harmful and reactive gases such as Sulphur dioxide (SO2) and sulphur trioxide (SO3) since both gases react with water and form sulphurous (H2SO3) and sulphuric acid (H2SO4). Chlorine gas can also be remove using water stripping.


What is formed whem Sulfur dioxide reacts with water?

Sulphurous acid is formed when sulphur dioxide dissolves in water. Sulphuric acid is formed when sulphur trioxide dissolves in water. Over time, sulphurous acid will oxidize to sulphuric. SO2 + H20 -> H2SO3 (sulphurous acid) SO3 + H20 -> H2SO4 (sulphuric acid)


Why is acid rain acidic?

All plants and animals must have sulphur. Coal and oil are made from old plants and animals that lived millions of years ago. They contain sulphur. Refineries can remove most of the sulphur from most of the oil turned into fuel oil or gasoline. Refineries, factories and power plants can remove the sulphur dioxide from their smokestacks. Frequently they do not. When they do not, the sulphur dioxide turns into sulphur trioxide. The Sulphur trioxide then when the sulphur trioxide runs into a cloud or a drop of water, it turns into sulphuric acid. When it falls to earth, it falls as acid rain. Acid rain is sulphuric acid falling to earth. In North Florida the rain accompanying the first cold front of the fall changed the pH of a swimming pool from 8 to 4. That indicates the amount of acid in the air over the Midwest and Midsouth of the United States. Right now technology exists to rid smokestacks of sulphuric acid.


How the acid rain happens?

Coal is made from trees that died long ago and were covered with dirt that turned to rock. Coal contains the same inorganic elements as trees and in the same percentages. One of those elements is sulphur. When coal burns, it produces a lot of carbon dioxide and a little bit of sulphur dioxide. Power plants and refineries can use scrubbers to remove sulphur dioxide from smoke or they can let it go into the atmosphere. When the sulphur dioxide reaches the atmosphere, it slowly turns into sulphur trioxide. When a molecule of sulphur trioxide meets with a molecule of water vapor, it forms a molecule of sulphuric acid, an extremely powerful acid. This joins other molecules of water to create dilute sulphuric acid. This falls as rain, acid rain. Petroleum also contains sulphur but the sulphur is generally removed in the refining process.