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