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WARM - UP
Date Session#
Activity Page#
10/18 & 10/21
20 Chemistry Review Packet 33
10/22 &10/23
21 Reaction Rate Wrap-Up/Last Chance to Balance
34
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• What makes these reactions occur again?– Collisions between molecules – (molecules are
bumping into each other and their valence electrons are bonding leading to a chemical reaction)
• And how does this affect the Rate of Reaction?– More collisions = more reactions at a faster rate– Less collisions = less reactions at a slower rate
“Collision Theory”
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Increasing the surface area (by breaking something into multiple pieces) increases the reaction rate…HERE’S WHY:
Wrap-Up:• Greater surface area = greater chance for collisions• More collisions = more/faster reactions taking place
Surface Area
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Increasing the temperature, increases the reaction rate…HERE’S WHY:
Wrap-Up:• Higher temperature makes particles speed up =
more collisions• More collisions = more/faster reaction taking
place
Temperature
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Increasing thepressure, increases the reaction rate…HERE’S WHY:
Wrap-Up:• Particles have less space to move in = more collisions• More collisions = more/faster reactions taking place
Pressure
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Increasing the concentration (amount of a substance) increases the reaction rate…HERE’S WHY:
Wrap Up:• Putting MORE of a substance into the same amount
of space = more collisions• More collisions = more/faster reactions taking place
Concentration
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Adding a catalyst increase the rate of reaction…HERE’S WHY:
Wrap-Up:• Catalysts act as a “matchmaker” to jump start
a reaction or make it faster• Catalysts are not affected or used during the
reaction
Catalysts
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•Does your class data table confirm these results?
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1st Block Data Table (A-day)Independent Variable What is Affecting the
Reaction Rate?Temperature Time for Reaction to
Complete
Powdered Alka Seltzer Tablet
concentration N/A 55.5 seconds
Broken Alka Seltzer Tablet
SURFACE AREA N/A 34 seconds
Whole Alka Seltzer Tablet
Surface Area N/A
Room Temp Water Temperature Room Temp.
Cold Water TEMPERATURE Cold 47
Hot Water Hot 26.26
Alka Seltzer in Film Canister
Surface area concentration
N/A 12.34 SECONDS
Denture Cleaner in Film Canister
Concentration, pressure
N/A 6 min
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3rd Block Data Table (A-day)Independent Variable What is Affecting the
Reaction Rate?Temperature Time for Reaction to
Complete
Powdered Alka Seltzer Tablet
surface area N/A 19 seconds
Broken Alka Seltzer Tablet
Surface area N/A 37 Seconds
Whole Alka Seltzer Tablet
concentration N/A 42 seconds
Room Temp Water Temperature Room Temp. 37.39
Cold Water Temperature Cold 50 Seconds
Hot Water Temperature Hot 1 minute 31 seconds
Alka Seltzer in Film Canister
Pressure N/A 7.97 seconds
Denture Cleaner in Film Canister
N/A
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4th Block Data Table (A-day)Independent Variable What is Affecting the
Reaction Rate?Temperature Time for Reaction to
Complete
Powdered Alka Seltzer Tablet
Surface area N/A 25.97 seconds
Broken Alka Seltzer Tablet
Surface Area N/A 37 seconds
Whole Alka Seltzer Tablet
pressure N/A 34 Seconds
Room Temp Water Surface AreaTemperature
Room Temp. 35 seconds
Cold Water temperature Cold 1 minute and 15 seconds
Hot Water Surface temperature Hot 13 seconds
Alka Seltzer in Film Canister
pressure N/A 17 seconds
Denture Cleaner in Film Canister
N/A
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1st Block Data Table (B-day)Independent Variable What is Affecting the
Reaction Rate?Temperature Time for Reaction to
Complete
Powdered Alka Seltzer Tablet
Surface area N/A 32 seconds
Broken Alka Seltzer Tablet
Inhibitor N/A 56 seconds
Whole Alka Seltzer Tablet
Surface area N/A 50 seconds
Room Temp Water Pressure Room Temp. 40 seconds
Cold Water Temperature Cold 36 seconds
Hot Water Temperature Hot 21 seconds
Alka Seltzer in Film Canister
Pressure N/A 11.2 seconds
Denture Cleaner in Film Canister
N/A
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3rd Block Data Table (B-day)Independent Variable What is Affecting the
Reaction Rate?Temperature Time for Reaction to
Complete
Powdered Alka Seltzer Tablet
Surface Area N/A 33.9
Broken Alka Seltzer Tablet
Surface area N/A 35.39
Whole Alka Seltzer Tablet
Surface area N/A 38 seconds
Cold Water Temprature Cold 49.9 seconds
Room Temp. Water Temperature Room Temp 41.7 seconds
Hot Water Temperature Hot 22 seconds
Alka Seltzer in Film Canister
Pressure N/A 16 seconds
Denture Cleaner in Film Canister
N/A
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4th Block Data Table (B-day)Independent Variable What is Affecting the
Reaction Rate?Temperature Time for Reaction to
Complete
Powdered Alka Seltzer Tablet
Surface area N/A 26 seconds
Broken Alka Seltzer Tablet
Surface Area N/A 45 sec
Whole Alka Seltzer Tablet
Surface Area N/A 45 seconds
Cold Water Temperature Cold 1 min. 13.41 sec.
Room Temp. Water Temperature Room Temp. 36.2 seconds
Hot Water Temperature Hot 23.46 seconds
Alka Seltzer in Film Canister
Pressure N/A 5 seconds
Denture Cleaner in Film Canister
N/A
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Ted Talks – Reaction Rates
• http://ed.ted.com/lessons/how-to-speed-up-chemical-reactions-and-get-a-date
• Answer the final question under Ted Talks – Reaction Rates
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Last Chance to Balance
• Balance the 5 equations on the sheet – if you get them correct you will be using the Chromebooks for the remainder of class to complete the “Study Buddy Review”
• If you get them incorrect you will be on the carpet in the front with me practicing how to balance equations.
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REVIEW• You can work with a PARTNER, as some games
require 2 players
• Play the review games listed on the sheet given to you and your partner…if you get through all of them ONLY then can you search for alternate CHEMISTRY RELATED sites
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EXPECTATIONS• I expect you and your partner to play only
what you are supposed to without being disruptive in any way!!
• When you are working with me you are expected to complete the equations
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P + O P₄O₁₀
Equation 1 - Balance Box AnswerEquation 1 - Balance Box Answer
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Cl₂ + NaBr NaCl + Br₂
Equation 2 - Balance Box AnswerEquation 2 - Balance Box Answer
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Cs + N₂ Cs₃N
Equation 3 - Balance Box AnswerEquation 3 - Balance Box Answer
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CuCl₂ + H₂S CuS + HCl
Equation 4 - Balance Box AnswerEquation 4 - Balance Box Answer
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Al + HCl AlCl₃ + H₂
Equation 5 - Balance Box AnswerEquation 5 - Balance Box Answer
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Balancing Equations Practice Homework
• Find the Balancing Equations Practice Homework or take another sheet – we will work on a few together, and then you can practice on your own.
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Lets Practice: Part D - #1
Na + MgF2 NaF + Mg
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Lets Practice: Part D - #2
Cl2 + KI KCl + I2
IMPORTANT:Cl = ChlorineK & I are 2 separate elements
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Lets Practice: Part D - #3
HCl + NaOH NaCl + H2O
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Lets Practice: Part D - #4
Na + NaNO3 Na2O + N2
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Lets Practice: Part D - #5
PbBr2 + HCl HBr + PbCl2
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REVIEW
•Try 6, 7 & 8 on your own, and then check
the answer key
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Lets Practice: Part D - #6
Na3P + CaF2 NaF + Ca3P2
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Lets Practice: Part D - #7
AlBr3 + K KBr + Al
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Lets Practice: Part D - #8
CaF2 + Li2SO4 CaSO4 + LiF