Unit 15 A famous detective A famous detective Sherlock Holmes.
Notes gb lab 07 chemical detective a
Transcript of Notes gb lab 07 chemical detective a
Notes
The student will: Distinguish the difference between a
chemical and a physical change Investigate and understand physical
changes in matter Investigate and understand chemical
changes in matter Investigate and understand chemical
formulas and the types of bonds found in simple compounds
The Law of Conservation of Mass/Matter
Chemical ChangePhysical ChangeChemical FormulaChemical EquationReactantProduct
States that mass/matter is neither lost or gained during a reaction, though it may change in substance, form, phase or state
When a substance changes its size or shape or phase/state of matter but still retains the properties of the original substance i.e.:▪ Paper being torn
into little pieces
When a new substance is created through the combination of chemicals or energy
i.e.: ▪ Paper burning and
turning into ash (carbon)
The way a substance or compound is expressed symbolically
▪CO2 is Carbon Dioxide
▪H2O is Water
▪C6H12O6 is Glucose
A math-like equation that shows how chemicals are combined
C + O2 CO2
▪ means “Yields”
The chemicals combined in a chemical equation
Located on the left side of the equation
Carbon (C) + 2 Oxygen atoms (O2)
▪C + O2 CO2
The final outcome of a chemical reaction
Located on the right side of the equation, (right of the yields symbol )
C + O2 CO2
▪Carbon (C ) + 2 Oxygen atoms (O2) = Carbon Dioxide (CO2)
Activity Chemical list Clues to Change
Notes (Cont,)
Simply mixing materials does not always produce a chemical change.There must be evidence of a
chemical change▪Measurable ▪Observable
Same substance only in a different: Shape Size Phase/State of Matter▪ Solid▪ Liquid
▪ Gas
A New substance must be formed!!!!!!!
One or more of these occurs
CCoolloorr CChhaannggee
Gas Formation Gas Formation (Bubbles/Fizzing)(Bubbles/Fizzing)
Temperature Change Temperature Change (Increase/Decrease)(Increase/Decrease)
Precipitate FormationPrecipitate Formation▪An insoluble compound forms at the
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