intro. to chemical reactions notes
DESCRIPTION
Intro. to CHEMICAL REACTIONS Notes. Binder organization. Tab 1: Reference Sheets Tab 2: Chemistry Handouts Tab 3: Math Handouts Tab 4: HW, Tests, quizzes Tab 5: Projects. Physical vs. Chemical Change. Physical change: A substance changes appearance, but it is still that substance - PowerPoint PPT PresentationTRANSCRIPT
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Intro. to CHEMICAL REACTIONS Notes
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Binder organization
• Tab 1: Reference Sheets• Tab 2: Chemistry Handouts• Tab 3: Math Handouts• Tab 4: HW, Tests, quizzes• Tab 5: Projects
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Physical vs. Chemical Change• Physical change: A substance changes
appearance, but it is still that substance– Example: Tearing paper
• Chemical change: A substance actually changes into something else– Example: Burning paper
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Chemical Reactions
• Chemical reaction: The process by which one or more substances change to form one or more different substances
• Evidence of Chemical Reactions1. Color change2. Bubbles (gas formed)3. Turns cloudy (solid/precipitate formed)4. Temperature change5. Change in smell
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Chemical Reactions
• Chemical reaction: The process by which one or more substances change to form one or more different substances
• Evidence of Chemical Reactions1. Color change2. Bubbles (gas formed)3. Turns cloudy (solid/precipitate formed)4. Temperature change5. Change in smell
![Page 8: Intro. to CHEMICAL REACTIONS Notes](https://reader035.vdocument.in/reader035/viewer/2022062315/56815a9f550346895dc826b4/html5/thumbnails/8.jpg)
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Chemical Reactions
• Chemical reaction: The process by which one or more substances change to form one or more different substances
• Evidence of Chemical Reactions1. Color change2. Bubbles (gas formed)3. Turns cloudy (solid/precipitate formed)4. Temperature change5. Change in smell
![Page 10: Intro. to CHEMICAL REACTIONS Notes](https://reader035.vdocument.in/reader035/viewer/2022062315/56815a9f550346895dc826b4/html5/thumbnails/10.jpg)
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Chemical Reactions
• Chemical reaction: The process by which one or more substances change to form one or more different substances
• Evidence of Chemical Reactions1. Color change2. Bubbles (gas formed)3. Turns cloudy (solid/precipitate formed)4. Temperature change5. Change in smell
![Page 12: Intro. to CHEMICAL REACTIONS Notes](https://reader035.vdocument.in/reader035/viewer/2022062315/56815a9f550346895dc826b4/html5/thumbnails/12.jpg)
Is it a chemical or physical change?
• Sugar dissolving in tea
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Is it a chemical or physical change?
• Logs burning
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Is it a chemical or physical change?
• Breaking water up by separating it into hydrogen and oxygen
• 2H2O 2H2 + O2
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Is it a chemical or physical change?
• Cutting paper
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Is it a chemical or physical change?
• Crushing an aspirin
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Is it a chemical or physical change?
• Metal rusting
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Is it a chemical or physical change?
• An egg rotting
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Is it a chemical or physical change?
• An egg breaking
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Writing Chemical Equations
• Reactants = starting materials• Products = ending materials
MgMg MgOMgO++ OO22(s) (g) (s)ReactantsReactants ProductProduct
States of Matter:Solid = (s)Liquid = (l)Gas = (g)Aqueous = (aq)
dissolved in water
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Writing Chemical Equations• Example:– Hydrogen gas reacts with oxygen gas to
produce liquid water
HH22 HH22OO++ OO22(g) (g) (l)
““reacts with”reacts with”““combines with”combines with”““is added to”is added to”
““to produce”to produce”““yields”yields”““to make”to make”““synthesizes”synthesizes”
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Write the Chemical Equation for the following:• Solid carbon reacts with oxygen gas to
produce gaseous carbon dioxideC(s) + O2(g) CO2(g)
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Write the Chemical Equation for the following:• Solid zinc metal is added to an aqueous
solution of hydrochloric acid (HCl) to produce hydrogen gas and aqueous zinc (II) chloride.
Zn(s) + HCl(aq) H2(g) + ZnCl2(aq)