notes gb lab 07 chemical detective a
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Notes
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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
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The Law of Conservation of Mass/Matter
Chemical ChangePhysical ChangeChemical FormulaChemical EquationReactantProduct
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States that mass/matter is neither lost or gained during a reaction, though it may change in substance, form, phase or state
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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
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When a new substance is created through the combination of chemicals or energy
i.e.: ▪ Paper burning and
turning into ash (carbon)
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The way a substance or compound is expressed symbolically
▪CO2 is Carbon Dioxide
▪H2O is Water
▪C6H12O6 is Glucose
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A math-like equation that shows how chemicals are combined
C + O2 CO2
▪ means “Yields”
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The chemicals combined in a chemical equation
Located on the left side of the equation
Carbon (C) + 2 Oxygen atoms (O2)
▪C + O2 CO2
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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)
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Activity Chemical list Clues to Change
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Notes (Cont,)
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Simply mixing materials does not always produce a chemical change.There must be evidence of a
chemical change▪Measurable ▪Observable
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Same substance only in a different: Shape Size Phase/State of Matter▪ Solid▪ Liquid
▪ Gas
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A New substance must be formed!!!!!!!
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One or more of these occurs
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CCoolloorr CChhaannggee
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Gas Formation Gas Formation (Bubbles/Fizzing)(Bubbles/Fizzing)
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Temperature Change Temperature Change (Increase/Decrease)(Increase/Decrease)
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Precipitate FormationPrecipitate Formation▪An insoluble compound forms at the
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