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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
What does "best" mean?
Most cost effective
Most definitive
Least steps
Quickest method
Most widely accepted
Safest
What is a "chemical substance"?
A pure form of matter
One type of molecule or atom
What are the different methods able to be used?
State of matter at room temp
Melting and boiling point
Solubility in other things
Visual Properties
pH test
Conductivity test
Chromatography
What are some limitations of the experiment?
Safety
No hazardous materials
No reactions which may release toxic fumes
Cost
Small sample sizes
Limited materials and equipment
Time
Be able to be done in one lesson
Straight forward tests
What are possible systematic and random errors?
Random
Environmental conditions
Human reaction time
Systematic
Measuring Callibration
Parallax
How do you "classify" a substance?
Mixture
Composition
Compound
Element
Reactivity
Acidity
Visual Appearance
Measurable characteristics
Melting and boiling point
Conductivity
Metal, nonmetal, metalloid
Bonding
Covalent
Metalic
Ionic