University:
California State University, Northridge
Course:
CHEM 566 | DNA-Protein Interactions
Academic year:

2021
Views:

427

Pages:

4
Author:

Prince Sampson

Unit 5: Chemical Reactions Phenomenon Introduction Equation for Filtering Carbon Dioxide: 2 LiOH(s) + CO2(g) → Li2CO3(s) + H2O(g) Equation for Producing Pure Oxygen: CO2(g) → O2(g) + CO(g) Our Unit Task/Questions: Physical Change A physical change alters Examples: Chemical Change A chemical change involves Examples: Examples 1. Ice Melting _____ Chemical ____ Physical 2. Toast Burning _____ Chemical ____ Physical 3. Sawing wood _____ Chemical ____ Physical 4. Metal Rusting _____ Chemical ____ Physical 5. Evaporating Puddle _____ Chemical ____ Physical 6. Candle Burning _____ Chemical ____ Physical Signs of a Chemical Reaction Evidence of Chemical Reaction includes: ○ _________________________ Change (gain or lose heat) ○ Precipitate Formation ( a solid substance forms) ○ ___________ Change ○ ______________ Given Off (energy release) ○ _________________ Formed (may look like bubbles in a liquid) ○ _________ _______________________ formed ○ Odor *Physical Change does not always indicate… Writing Balanced Chemical Equations PhET Simulation Goal: Play the “Game” and get 4 stars on all three levels of the game! What patterns did you notice that got you the win? What did you do? Chemical Change (Reaction) Def: 🌟 Law of Conservation of Mass A chemical reaction equation shows this process: The Law of Conservation of Mass All of the ingredients are still there, just in a different form! Ratios (ft. subscripts) Purpose: Ratios (ft. coefficients) Purpose: Difference between Subscripts and Coefficients: Subscripts (small numbers) If you change… Balanced Chemical Equations - Coefficients (big numbers) Preserve the Law of Conservation of Mass… Symbols in Chemical Reaction Equations Symbol State (s) solid (l) liquid (g) __________________ __________ Aqueous (dissolved in water) Δ __________________ Memorize Diatomic Elements: Balancing Chemical Reactions Tip #1 Tip #2 Use coefficients that result in the LOWEST ONLY change the _______________ MULTIPLE _____________________. DO ________ change the subscripts Examples Tip #3 Balance H’s and O’s ________ and in that Tip #4 Make sure all coefficients are order (H then O) _____________ ________________ ____Al2O3 → ___Fe2O3 _____ Al + ___ C + → _____ O2 ___ Fe + ___ CO2

Unit 5 Chemical Reactions Assignment

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