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What is the best method to classify a chemical substance? - Coggle Diagram
What is the best method to classify a chemical substance?
Dissolution
Factors that affecting solubility
Molecular size
Pressure
Tempertaure
Background information
what does it means for a substance to dissolve in water?
If a substance dissolves in liquid or if you dissolve it, it becomes mixed with the liquid and disappears. (Collins Dictionary)
what does it means for a substance to dissolve?
when the solute breaks up from a larger crystal of molecules into much smaller groups or individual molecules. (Ducksters)
what is solubility?
the ability of a solid, liquid, or gaseous chemical substance (referred to as the solute) to dissolve in solvent (usually a liquid) and form a solution. (UEN Digital Press)
Possible question for investigation
Do substances dissolve in water?
Conduct The Electricity
Background information
What does mean to conduct the electricity?
It means the electrons are free to move.
Conduct the electricity in the water
it means the substance is ionic bonding
Conduct the electricity in solid state
It means the substance is metallic
Method
experiment which uses a conductivity tester
Factors that affecting the conductivity of a sollution
the type of ions
the concentrations of ions
the temperature of the solution
Possible question for investigation
Do substances conduct the electricity
Do substance conduct the electricity in the water?
Melting Point
Background information
What does mean to have a high melting point?
Basically, the heavier the particles in the solid, and the stronger the bonding, the higher the melting point. (Primary Connection)
it means the substance the solid. However, the substance is not a covalent molecular in this case.
The standard of a high melting point
When a melting point is less than 200 ° Celsius, it's a low melting point but when a melting point is grater than 200° Celsius, it's a high melting point.
Possible question for investigation
Do substances have a high melting point?
Factors affecting Melting point
Solution
Pressure
Bonding
The compounds having ionic bonding have more melting points than compounds having covalent bonding.
Hydrogen bonding
The compounds having intermolecular hydrogen bonding have more melting points than compounds having intramolecular hydrogen bonding.
Hardness of Substance
Background information
What does mean a substance is hard to break down?
It means the substance is held together by strong attraction
Factors that affecting being hard to break down
Possible question for investigation
Are substances hard to break down?
Factors that determine the hardness of solid
the nature and strength of the bonds that bind the atoms
molecules/ ions in a crystal lattice.
Background information
what are substances?
“A substance is a matter which has a specific composition and specific properties. ”