Please enable JavaScript.
Coggle requires JavaScript to display documents.
What is the best method to classify a chemical substance? - Coggle Diagram
What is the best method to classify a chemical substance?
Methods of classifying chemical substances
Type of bond
Metallic
Ionic
Covalent
molecular
Chemical structure
Metallic
Giant covalent
Ionic Lattice
Molecular Covalent
Physical properties
Boiling and melting point
Density
Hardness
Malleability
State of matter
Gas
Solid
Liquid
Non-newtonian fluid
Chemical properties
pH level
Reactivity with Acids
Reactivity with water
Reactivity with oxygen (oxidation states)
Flammability
Element or compound
Element
Metal
non-metal
metalloid
Compound
ionic
polyatimic ions
Chemical compound
Organic or inorganic
Organic (Contains carbon)
Proteins
Carbs
Lipids
Inorganic (doesn't contain carbon)
Bases
acids
Salts
Water
Type of mixture
Heterogenous
homogenous
Initial questions
Is there a need for regulatory compliance?
What properties are we considering?
What is the substance's intended use?
How do you classify something?
Chemical properties/reactions
pH measurements
high
A high pH level in a chemical substance means that it is highly basic or alkaline
low
A low pH level in a chemical substance means that it is highly acidic
element analysis
Can tell you chemical composition, organic v inorganic, purity and impurities.
Reactivity tests
Can find out acidity, flammability, oxidising agents, corrosiveness and more.
What is a chemical?
A chemical is any substance that has a defined composition. In other words, a chemical is always made up of the same "stuff." Some chemicals occur in nature, such as water. Other chemicals are manufactured, such as chlorine (used for bleaching fabrics or in swimming pools).
What different bonds does a chemical form?
Covalent
A covalent bond can be defined as a bond formed between atoms by sharing electrons.
ionic
An ionic bond is a chemical bond formed when one atom gives up one or more electrons to another atom.
metallic
A metallic bond is a type of chemical bond formed between positively charged atoms in which the free electrons are shared among a lattice of cations.
molecular
Molecular bonds are formed when atoms share or transfer
valence electrons
What is a chemical substance?
A chemical substance is a unique form of matter with constant chemical composition and characteristic properties.
What is a method?
A method in analytical chemistry is any technique used in a lab to detect a chemical, find a chemical's identity, or find out how much of a chemical there is in a mixture.
What are the variabels
Dependant variable
Best method
Independant variable
Method used to classify the chemical substance
controlled variable
the chemical substance that is being classified