SS2: CHEMISTRY - 3RD TERM
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Hydrogen and its Compounds7 Topics|1 Quiz
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Oxygen and its Compounds7 Topics|1 Quiz
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Halogens, Chlorine and its Compounds7 Topics|1 Quiz
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Hydrogen Chloride and Hydrochloric Acid5 Topics|1 Quiz
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Nitrogen and Its Compounds9 Topics|1 Quiz
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Ammonia9 Topics|1 Quiz
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Sulphur and its Compounds13 Topics|1 Quiz
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Occurrence and Oxidation States of Sulphur
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Allotropes of Sulphur
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Properties of Sulphur
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Uses of Sulphur
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Laboratory Preparation of Hydrogen Sulphide
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Properties of Hydrogen Sulphide
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Uses of Hydrogen Sulphide
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Sulphur(IV) Oxide (SO₂)
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Trioxosulphate(IV) Acid
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Industrial Preparation of Tetraoxosulphate(VI) Acid
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Properties of Tetraoxosulphate(VI) Acid
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Uses of Tetraoxosulphate(VI) Acid
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Theory Questions - Sulphur and its Compounds
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Occurrence and Oxidation States of Sulphur
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Hydrocarbons12 Topics|1 Quiz
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Alkanols4 Topics|1 Quiz
Binary Compounds of Oxygen: Oxides
Topic Content:
- Acidic Oxides
- Basic Oxides
- Amphoteric Oxides
- Neutral Oxides
- Peroxides
- Higher Oxides
Oxides are binary compounds of oxygen with another element. Examples of oxides are CO2 , SO2 , CaO, CO, ZnO, BaO2 , and H2 O. Based on their acid-base characteristics oxides are classified as acidic, basic, amphoteric, or neutral.
Acidic Oxides:
Acidic oxides are oxides of non-metals. They are also called acid anhydrides. Acidic oxides dissolve in water to give acidic solutions. CO2(g) , SO2(g) , and NO2(g) are examples of acidic oxides.
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\( \scriptsize SO_{2(g)} + H_2O_{(l)} \large \rightarrow \scriptsize \underset {Trioxosulphate (IV)\: acid}{H_2SO_{3(aq)}} \)
\( \scriptsize CO_{2(g)} + H_2O_{(l)} \large\rightarrow\scriptsize \underset {Trioxocarbonate (IV)\: acid}{H_2CO_{3(aq)}} \)
\( \scriptsize NO_{2(g)} + H_2O_{(l)} \large \rightarrow \scriptsize \underset {Trioxonitrate (V)\: acid}{HNO_{3(aq)}} \)
Basic Oxides:
Generally, the alkali metals and the alkaline earth metals form basic oxides with oxygen. The soluble basic oxides, also called basic anhydrides, react with water to produce hydroxides (alkalis) For example, potassium oxide and sodium oxide will each react with water to produce potassium hydroxide and sodium hydroxide respectively as shown in the equation below.
K2 O(s) + H2 O(l) → 2KOH(aq)
Na2 O(s)
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