Chemical Reactions Flashcards
Combination Reactions
Where two elements produce a single more complex compound.
A + B ===> AB
Decomposition Thermal Reaction
Reactions that involve the breaking down of a chemical substance by using strong heat.
AB ==> A + B
Decomposition Catalytic Reaction
Reactions that involve the breaking down of a chemical substance using another chemical - a catalyst.
AB ==> A + B
Precipitation Reactions
When two ionic solutions are mixed and an insoluble (precipitate) forms.
AB + CD ==> AD + CB
Ionic Bonding
A bond formed between a metal and a non metal.
Oxide
Covalent Bonding
A bond formed between a non metal and a non metal.
Dioxide
Decomposition Reaction
When a compound breaks down its its component elements or simpler compounds.
Catalyst
Substance that increases the rate of reaction of a chemical reaction. It provides an alternate pathway with a lower activation energy for the reaction. It is not used up in the reaction and may be able to be reused.
Metal Carbonate ==>
Metal oxide + carbon dioxide
Metal Hydrogen Carbonate ==>
metal carbonate + carbon dioxide + water
Metal Hydroxide ==>
metal oxide + water
Test for the confirmation of CO2
Lime water is milky
Test for the confirmation of H2O
Cobalt Chloride paper is pink
Why does a precipitate form in precipitation reactions?
This reaction happens due to the combination of ions from the two solutions, resulting in an insoluble compound that separates out as a solid.
Aqueous
In water
Soluble
A substances ability to dissolve in a particular solvent.
Insoluble
A substance that doesn’t dissolve in a particular solvent - forms a precipiate
Milo Milkshake
Solvent: milk
Solute: milo powder
Solution: milo milkshake
Spectator Ion
Ion that does not take part in a chemical reaction. It remains unchanged. It is left out of ionic equations.
For example:
NaCl + AgNO3 ==> AgCl + NaNO3
Spectator Ions:
Na+ and NO3-
Manganese Dioxide
Is a catalyst typically for hydrogen peroxide (H202)
