Category: Chemistry

Functional groups 0

Functional groups

Functional groups determine the properties of the entire molecule. It is a group of atoms which gives a characteristic set of properties to a molecule containing that group.   Alkane Insoluble with water (no...

Polymers 0

Polymers

Organic molecules are able to combine to form very long chains A repeating unit is called a monomer, and are the molecules which make up the polymer. Addition polymers Occur under high temperature and...

Soaps and detergents 0

Soaps and detergents

Fats and oils Fats and oils are triglycerides (triesters of glycerol) Fats are solid at RT, oils are liquids Degree of saturation, as well as cis/trans isomers, partially determines this as well Saponification Fat and...

Amino acids 0

Amino acids

Specifically α-amino acids: A carboxylic acid where the amine group is attached to the α-carbon i.e. the carboxyl group and the amine group is attached to the same carbon   1-aminoethanoic acid General structure:...

Electrochemical cells 0

Electrochemical cells

Redox reactions involve the transfer of elections Electricity is simply the flow of electrons Hence, having the reduction and oxidation reactions in two locations, with a wire to connect them and a salt bridge...

Redox reactions 0

Redox reactions

Oxidation numbers A system used to assign numbers to keep track of electron transfers in molecules, ions and atoms. The oxidation number of a free element is always 0. The oxidation number of an...

Titration curves summary 0

Titration curves summary

  X added to Y Before EP At EP After EP Strong acid to strong base Gradual down slope Large vertical section Gradual down slope Strong acid to weak base Steep section then flattens...

Titration curves (pH) 0

Titration curves (pH)

Titration curves can be described as what happens before, after and during the equivalence point. Titration curves for strong acid v strong base Running acid into the alkali The pH drops very little until...

Indicators 0

Indicators

Equivalence point You use and indicator to tell you when you reach the endpoint of the reaction This occurs when the indicator changes colour However, in reality, you should only stop when the solutions...

Titration procedures 0

Titration procedures

A way of finding the concentration of an unknown solution (acid or base) by measuring the volume of the unknown that is required to react with a known volume of a standard solution (that...

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