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Difference between revisions of "Word Equation"
 
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===Examples===
 
===Examples===
−
<math>{\tfrac{Calcium}{Carbonate}} \to {\tfrac{Calcium}{Oxide}} + {\tfrac{Carbon}{Dioxide}}</math>
 
  
−
<math>CalciumCarbonate \to CalciumOxide + Carbondioxide</math>
+
====Combustion Reactions====
 +
These [[combustion]] [[Chemical Reaction|reactions]] involve [[Electron Sharing|electron sharing]].
 +
: [[Methane]] + [[Oxygen]] → [[Carbon Dioxide]] + [[Water]]
 +
: [[Ethane]] + [[Oxygen]] → [[Carbon Dioxide]] + [[Water]]
 +
: [[Propane]] + [[Oxygen]] → [[Carbon Dioxide]] + [[Water]]
 +
 
 +
====Oxidation Reactions====
 +
[[Oxidation]] [[Chemical Reaction|reactions]] involve [[Electron Transfer|electron transfer]].
 +
: [[Magnesium]] + [[Oxygen]] → [[Magnesium Oxide]]
 +
: [[Aluminium]] + [[Oxygen]] → [[Aluminium Oxide]]
 +
: [[Iron]] + [[Oxygen]] → [[Iron Oxide]]
 +
 
 +
====Displacement Reactions====
 +
[[Displacement Reaction|Displacement]] [[Chemical Reaction|reactions]] involve [[Electron Transfer|electron transfer]].
 +
: [[Copper Sulphate]] + [[Magnesium]] → [[Magnesium Sulphate]] + [[Copper]]
 +
: [[Iron Chloride]] + [[Calcium]] → [[Calcium Chloride]] + [[Iron]]
 +
: [[Lithium Hydroxide]] + [[Potassium]] → [[Potassium Hydroxide]] + [[Lithium]]
 +
: [[Iron Oxide]] + [[Aluminium]] → [[Aluminium Oxide]] + [[Iron]]
 +
 
 +
====Neutralisation Reactions====
 +
[[Neutralisation]] [[Chemical Reaction|reactions]] involve [[Proton Transfer|proton transfer]].
 +
: [[Hydrochloric Acid]] + [[Lithium Oxide]] → [[Lithium Chloride]] + [[Water]]
 +
: [[Hydrochloric Acid]] + [[Iron Oxide]] → [[Iron Chloride]] + [[Water]]
 +
: [[Sulphuric Acid]] + [[Potassium Hydroxide]] → [[Potassium Sulphate]] + [[Water]]
 +
: [[Sulphuric Acid]] + [[Aluminium Hydroxide]] → [[Aluminium Sulphate]] + [[Water]]
 +
: [[Nitric Acid]] + [[Magnesium Carbonate]] → [[Magnesium Nitrate]] + [[Carbon Dioxide]] + [[Water]]
 +
: [[Nitric Acid]] + [[Titanium Carbonate]] → [[Titanium Nitrate]] + [[Carbon Dioxide]] + [[Water]]
 +
 
 +
====Thermal Decomposition Reactions====
 +
[[Thermal Decomposition]] [[Chemical Reaction|reactions]] involve both [[Electron Sharing|electron sharing]] and [[Electron Transfer|electron transfer]].
 +
: [[Calcium Carbonate]] → [[Calcium Oxide]] + [[Carbon Dioxide]]
 +
: [[Copper Carbonate]] → [[Copper Oxide]] + [[Carbon Dioxide]]
 +
: [[Zinc Carbonate]] → [[Zinc Oxide]] + [[Carbon Dioxide]]
 +
 
 +
===References===
 +
====AQA====
 +
 
 +
:[https://www.amazon.co.uk/gp/product/1782945962/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945962&linkCode=as2&tag=nrjc-21&linkId=476bb5c8d1dfb5c08ac81b6d4d1c98d8 ''Word equations, page 31, GCSE Chemistry, CGP, AQA '']
 +
:[https://www.amazon.co.uk/gp/product/178294639X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=178294639X&linkCode=as2&tag=nrjc-21&linkId=51599bb45a2bfaf7c1b6a978b2ca2616 ''Word equations, page 31, GCSE Combined Science Trilogy; Chemistry, CGP, AQA '']
 +
:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Word equations, page 6, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']
 +
 
 +
====Edexcel====
 +
 
 +
:[https://www.amazon.co.uk/gp/product/1782945725/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945725&linkCode=as2&tag=nrjc-21&linkId=694be7494de75af3349537d34e13f7f0 ''Word equations, page 12, GCSE Chemistry; The Revision Guide, CGP, Edexcel '']
 +
:[https://www.amazon.co.uk/gp/product/1782948147/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948147&linkCode=as2&tag=nrjc-21&linkId=f63dcd8345f4e49c717b39a228a36c7c ''Word equations, page 22, GCSE Chemistry, CGP, Edexcel '']
 +
:[https://www.amazon.co.uk/gp/product/1782945741/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945741&linkCode=as2&tag=nrjc-21&linkId=30da4f2178da182547b62a7329d13b57 ''Word equations, page 75, GCSE Combined Science; The Revision Guide, CGP, Edexcel '']
 +
 
 +
====OCR====
 +
:[https://www.amazon.co.uk/gp/product/0198359829/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359829&linkCode=as2&tag=nrjc-21&linkId=90e8d7b4f039d53035238fa0320fe00b ''Word equations, page 92, Gateway GCSE Chemistry, Oxford, OCR '']

Latest revision as of 12:11, 25 December 2019

Key Stage 3

Meaning

A word Equation is a way of representing chemical reactions to show the reactants and products using the names of the chemicals.

About Word Equations

In a word equation the reactants are on the left and the products are on the right.
ReactantsProducts.png
Word equations can be used to show the names of chemicals before and after reactions but they do not show the numbers of molecules or the number of atoms in each molecule. For that information you need a Balanced Symbol Equation.

Examples

Hydrogen+Oxygen=Water.png
Methane+Oxygen.png
Magnesium+Oxygen=MagnesiumOxide.png
HydrochloricAcid+LithiumOxide.png

Key Stage 4

Meaning

A word equation is a way of representing chemical reactions to show the reactants and products using the names of the chemicals.

About Word Equations

In a word equation the reactants are on the left and the products are on the right.

Examples

Combustion Reactions

These combustion reactions involve electron sharing.

Methane + Oxygen → Carbon Dioxide + Water
Ethane + Oxygen → Carbon Dioxide + Water
Propane + Oxygen → Carbon Dioxide + Water

Oxidation Reactions

Oxidation reactions involve electron transfer.

Magnesium + Oxygen → Magnesium Oxide
Aluminium + Oxygen → Aluminium Oxide
Iron + Oxygen → Iron Oxide

Displacement Reactions

Displacement reactions involve electron transfer.

Copper Sulphate + Magnesium → Magnesium Sulphate + Copper
Iron Chloride + Calcium → Calcium Chloride + Iron
Lithium Hydroxide + Potassium → Potassium Hydroxide + Lithium
Iron Oxide + Aluminium → Aluminium Oxide + Iron

Neutralisation Reactions

Neutralisation reactions involve proton transfer.

Hydrochloric Acid + Lithium Oxide → Lithium Chloride + Water
Hydrochloric Acid + Iron Oxide → Iron Chloride + Water
Sulphuric Acid + Potassium Hydroxide → Potassium Sulphate + Water
Sulphuric Acid + Aluminium Hydroxide → Aluminium Sulphate + Water
Nitric Acid + Magnesium Carbonate → Magnesium Nitrate + Carbon Dioxide + Water
Nitric Acid + Titanium Carbonate → Titanium Nitrate + Carbon Dioxide + Water

Thermal Decomposition Reactions

Thermal Decomposition reactions involve both electron sharing and electron transfer.

Calcium Carbonate → Calcium Oxide + Carbon Dioxide
Copper Carbonate → Copper Oxide + Carbon Dioxide
Zinc Carbonate → Zinc Oxide + Carbon Dioxide

References

AQA

Word equations, page 31, GCSE Chemistry, CGP, AQA
Word equations, page 31, GCSE Combined Science Trilogy; Chemistry, CGP, AQA
Word equations, page 6, GCSE Chemistry; Third Edition, Oxford University Press, AQA

Edexcel

Word equations, page 12, GCSE Chemistry; The Revision Guide, CGP, Edexcel
Word equations, page 22, GCSE Chemistry, CGP, Edexcel
Word equations, page 75, GCSE Combined Science; The Revision Guide, CGP, Edexcel

OCR

Word equations, page 92, Gateway GCSE Chemistry, Oxford, OCR
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