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What are the products of a chemical reaction?

Decomposition

Breaking down of a compound into its simple starting reactants (into elements)

Light

AgBr => Ag + Br
(Light Energy)

Electrolysis

Bleach is made by the electrolysis of sale water

NaCl => Na + Cl
)Electrical Energy)

Thermal

CaCO3 => CaO + CO2
(Heat Energy)

Synthesis

Combination of 2 reactants, only one product

Chemical Changes

Colour changes

Heat/Light released/ absorbed

Formation of gas/ precipitate

Precipitate: does not dissolve, solid at room temperature

Production of odour

MISCONCEPTION:
Dissolution is a physical change (state change)
Students consider solid dissolved in liquid due to the solid 'disappearing'.

Higher Temperature, more kinetic energy (move faster), increase in the rate of reaction

Double Displacement

2 compounds to start; 2 compounds produced

Nature of the product, determined by solubility table

When a more reactive element takes the place of a less reactive one in a compound

AB + CD => AD + BC

The cations and anions switch elements

Separates Compounds

Obeys the Law of Mass Conservation

Balance Equations

Types and number of atoms are the same on each side of the equation

Rearrangement of atoms (Chemical Reaction)

Precipitation

When solutions mix together to form a solid

Lead Nitrate (l) + Potassium Iodide (l)

Lead Iodide(s) + Potassium Nitrate (l)

Neutralisation

C.A.W.C.S

Carbonate + Acid =>
Water + Carbon Dioxide + Salt

CuCO3 + 2HCl =>
CuCl2 + H2O + CO2

M.A.S.H

Metal + Acid => Salt + Hydrogen

Sn + 2HCl =>
SnCl2 + H2

B.A.W.S

Base + Acid => Water + Salt

Acid - Base titrations

AH + BOH => AB +H20

A.A.W.S

Acid + Alkail => Water + Salt

HCl + NaOH =>
H20 + NaCl

Processes taking occurring when Aboriginal & Torres Strait Islanders detoxify food

Cycad seeds

cycasin toxin
broken down and removed

rearranging atoms => new substance formation

number of atoms in reactants =
number of atom in products

subscripts
number of atoms in molecule => atomic properties

MISCONCEPTION:
that subscripts and coefficients are interchangeable

coefficients
number of molecules for reaction (completed)

Redox reactions

Oxidation

Fe + O => FeO

This is also known as Rusting

gain oxygen, remove hydrogen;
increase oxidation number, decrease electrons

Reduction

losing oxygen, gaining hydrogen;
decrease oxidation number, increase electrons