In this I/GCSE Chemisty blog post, the topic will be on the relationship between oxygen and oxides,a nd what reactions will occur.
Air is a mixture of gases with different boiling points:
- Oxygen: (21%)
- Nitrogen: (78%)
- Carbon dioxide (0.04%)
- Argon (0.9%)
- Small percentages of pollutant gases such as carbon monoxide, sulfur dioxide, and oxides of nitrogen aswell as water vapour
Oxygen and oxides
- The metallic elements burn to form solid oxides
- When non-metallic elements burn they often form oxides which are produced as gases
These reactions with oxygen to form oxides are known as combustion reactions
- They are examples of oxidation in which oxygen is added to an element
- Reactions in which oxygen is removed from an oxide are known as reduction
Metal oxides: dissolve in water to make an alkaline solution
- Some metal oxides do not dissolve in water - they test neutral with universal indicator however they do react with acid. Insoluble metal oxides are called bases
- Some metal oxides are called amphoteric. Amphoteric oxides behave like both acids and bases. They do not dissolve in water so we cannot test the pH of solutions formed
- However they do react and dissolve in acids and alkalis
Non-metal oxides: dissolve in water to form acids
In general metal oxides are basic & non-metal oxides are acidic
That's all for this post!
References:
https://www.google.com/url?sa=i&url=https%3A%2F%2Fthefactfactor.com%2Ffacts%2Fpure_science%2Fchemistry%2Fphysical-chemistry%2Fredox-reactions%2F11959%2F&psig=AOvVaw2lLcFvaglBLO0TOd6QpgMR&ust=1628046126139000&source=images&cd=vfe&ved=0CAsQjRxqFwoTCOjK9Mruk_ICFQAAAAAdAAAAABAD
https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.chemistrylearner.com%2Fchemical-reactions%2Fcombustion-reaction&psig=AOvVaw1Zo_YKBRLr9LsYJl9sSNEi&ust=1628046095578000&source=images&cd=vfe&ved=0CAsQjRxqFwoTCLjAtdTuk_ICFQAAAAAdAAAAABAD