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Nonmetal oxygen compounds

Most nonmetals react with oxygen to form nonmetal oxides. Depending on the available oxidation states for the element, a variety of oxides might form. Fluorine will combine with oxygen to form fluorides such as OF 2 , where the oxygen has a 2+-oxidation state.

Sulfur oxygen compounds

The two common oxides of sulfur are sulfur dioxide, SO 2 , and sulfur trioxide, SO 3 . The odor of burning sulfur comes from sulfur dioxide. Sulfur dioxide, shown in [link] , occurs in volcanic gases and in the atmosphere near industrial plants that burn fuel containing sulfur compounds.

A ball-and-stick model shows a yellow atom labeled, “S,” bonded on either side to a red atom labeled, “O.” A pair of Lewis structures are shown connected by a double-headed arrow. The left Lewis structure shows a sulfur atom with one lone pair of electrons double bonded on the left to an oxygen atom with two lone pairs of electrons and single bonded on the right to an oxygen atom with three lone pairs of electrons. The right Lewis structure is a mirror image of the structure on the left.
This image shows the molecular structure (left) and resonance forms (right) of sulfur dioxide.

Commercial production of sulfur dioxide is from either burning sulfur or roasting sulfide ores such as ZnS, FeS 2 , and Cu 2 S in air. (Roasting, which forms the metal oxide, is the first step in the separation of many metals from their ores.) A convenient method for preparing sulfur dioxide in the laboratory is by the action of a strong acid on either sulfite salts containing the SO 3 2− ion or hydrogen sulfite salts containing HSO 3 . Sulfurous acid, H 2 SO 3 , forms first, but quickly decomposes into sulfur dioxide and water. Sulfur dioxide also forms when many reducing agents react with hot, concentrated sulfuric acid. Sulfur trioxide forms slowly when heating sulfur dioxide and oxygen together, and the reaction is exothermic:

2 SO 2 ( g ) + O 2 ( g ) 2 SO 3 ( g ) Δ H ° = −197.8 kJ

Sulfur dioxide is a gas at room temperature, and the SO 2 molecule is bent. Sulfur trioxide melts at 17 °C and boils at 43 °C. In the vapor state, its molecules are single SO 3 units (shown in [link] ), but in the solid state, SO 3 exists in several polymeric forms.

A ball-and-stick model shows a yellow atom labeled, “S,” bonded to three red atoms labeled, “O.” Three Lewis structures are shown connected by double-headed arrows. The left Lewis structure shows a sulfur atom single bonded on the lower left and right to oxygen atoms with three lone pairs of electrons each. The sulfur atom is also double bonded above to an oxygen atom with two lone pairs of electrons. The middle and right Lewis structures are the same as the left, but show the double bonded oxygen in the lower left and lower right positions, respectively.
This image shows the structure (top) of sulfur trioxide in the gas phase and its resonance forms (bottom).

The sulfur oxides react as Lewis acids with many oxides and hydroxides in Lewis acid-base reactions, with the formation of sulfites or hydrogen sulfites , and sulfates or hydrogen sulfates , respectively.

Halogen oxygen compounds

The halogens do not react directly with oxygen, but it is possible to prepare binary oxygen-halogen compounds by the reactions of the halogens with oxygen-containing compounds. Oxygen compounds with chlorine, bromine, and iodine are oxides because oxygen is the more electronegative element in these compounds. On the other hand, fluorine compounds with oxygen are fluorides because fluorine is the more electronegative element.

As a class, the oxides are extremely reactive and unstable, and their chemistry has little practical importance. Dichlorine oxide, formally called dichlorine monoxide, and chlorine dioxide, both shown in [link] , are the only commercially important compounds. They are important as bleaching agents (for use with pulp and flour) and for water treatment.

Two space filling models are shown and labeled, “a,” and “b.” Model a shows a red atom labeled, “O,” bonded to two green atoms labeled, “C l,” in a v-shape. Model b shows a green atom labeled, “C l,” bonded to two red atoms labeled, “O,” in a v-shape.
This image shows the structures of the (a) Cl 2 O and (b) ClO 2 molecules.

Nonmetal oxyacids and their salts

Nonmetal oxides form acids when allowed to react with water; these are acid anhydrides. The resulting oxyanions can form salts with various metal ions.

Questions & Answers

How to know periodic table oftend
Ahmed Reply
how to get atomic number of an element
Ogunleye Reply
how do you solve the examples in a much more explanatory way
Ogunleye
The reaction of aceto nitrile with propane in the presence of the acid
Explain this paragraph in short
Manish Reply
What is solid state?
Manish Reply
What is chemical reaction
Manish
transforming reactants to product(s)
Andre
process
Andre
Example of Lewis acid
Chidera Reply
Example of Lewis acid
Chidera
Chlorine
Mikidad
Anything with an empty orbital... the hydrogen ion is the most common example. BH3 is the typical example, but any metal in a coordination complex can be considered a Lewis acid.
Eszter
okay thanks
Jovial
aluminium and sulphur react to give aluminium sulfide.How many grams of Al are required to produce 100g of aluminium sulphide
Soni Reply
aluminium and sulphur react to give aluminium sulphide how many grams of Al are required to produce 100g of aluminium sulphide?
Soni
aluminium and sulphur react to give aluminium sulphide how many grams of Al are required to produce 100g of aluminium sulphide?
Soni
2Al+3S=Al2S3
galina
m(Al)=100×27×2/150=36g
galina
150 comes from?
Soni
thank you very much
Soni
molar mass of Al2S3
galina
150.158
thiru
Why can't atom be created or destroyed
Jacaranda Reply
matter simply converts to pure energy
explain how to distinguish ethanol from a sample of ethanoic acid by chemical test
Alice Reply
explain how ethanol can be distinguished from ethanoic acid by chemical test
Alice
Using a suitable experiment, describe how diffusion occurs in gases.
Melody Reply
what is electrolytes?
charity Reply
substance which splits into ions during melting or dissolving
galina
on passing electric current though electrode
Kv
what is a radical
Jacob Reply
State that use law of partial pressure in a gas jar containing a gas and water what is the total pressure composed of 272cm^3 of carbon (iv) oxide were collected over water at15°c and 782mmHg pressure. calculate the volume of the dry gas at stp(SVP of water at 15°c is 12mmHg)
Aminat Reply
was Dalton's second postulate"atoms of the same kind have have similar/same mass and size" Or " the one mentioned in B here?
Maureen Reply
what was name of the Greek philosophers
Duku Reply

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Source:  OpenStax, Chemistry. OpenStax CNX. May 20, 2015 Download for free at http://legacy.cnx.org/content/col11760/1.9
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