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Alka Seltzer Lab
Objectives:Today I will be able to:
Design and conduct a controlled experiment investigating ways to speed up a chemical reaction
Informal assessment: monitoring group discussions as they design and conduct the experiment
Formal assessment: Analyzing student procedures, data and conclusions
Common Core Connection:Use appropriate tools strategicallyAttend to precision
Lesson SequenceDay 1
Evaluate: Warm UpEngage/Explore: Pre-Lab ObservationExplain: Designing a problemElaborate: Writing a ProcedureEvaluate: Exit Ticket
Day 2Evaluate: Warm UpEngage/Elaborate: Data CollectionElaborate: Conclusion WritingEvaluate: Peer EvaluationEvaluate: Exit Ticket
Warm Up (Day 1)What are the steps to the Scientific
Method?What does it mean to control an
experiment? Why is this important?In a lab setting, how could you measure the
rate of a chemical reaction?How would you know that the reaction rate
increased?
Warm Up (Day 2)
ObjectivesToday I will be able to:
Design and conduct a controlled experiment investigating ways to speed up a chemical reaction
HomeworkStudy for Scientific Notation Quiz Tomorrow
Begin studying for Intro to Chemistry Exam
Bring technology to class for Monday’s Lesson
Agenda – Day 1Warm UpPre-Lab ObservationDesigning a problemWriting a ProcedureExit Ticket
Agenda – Day 2Warm UpData CollectionConclusion WritingPeer EvaluationExit Ticket
Pre – Lab Observation
Lab SafetyGoggles and Aprons must be worn to
participateDo not get the Alka-Seltzer tablet wet
before beginning the reactionLiquid waste can be disposed of down the
drain
Brainstorming
Designing a Problem
BrainstormingHow does your family keep food from spoiling
quickly?How could you get a solid (like sugar) to dissolve
quickly in water?What materials are available to use in the lab?
Lab Materials AvailableWaterBeakerStopwatchAlka-Seltzer (2 tablets)Stirring RodHot PlateMortar and Pestle
Write the procedure and design the data table. Both must be approved
by the teacher before you may begin collecting data.
Procedure
Be sure to follow all lab safety rules from the previous day
Data Collection
Write a conclusion. We will peer evaluate the conclusions using a
rubric
Conclusion
Exit Ticket – Day 1What variable are you testing in your
experiment?How do you plan on controlling your
experiment?
Exit Ticket – Day 2What were some errors that you
encountered during the lab?If you could do the experiment again what
would you change