NES: Electrolysis of Water: A Breath of Fresh Air...The lab activity A Breath of Fresh Air Requires...

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February 21, 2012

NES: Electrolysis of Water: A Breath of Fresh Air

Presented by: Alissa Keil

Electrolysis of Water: A Breath of Fresh Air

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Presented by:Alissa Keil, NES Educational Specialist

Oklahoma State UniversityNASA Johnson Space Center

Teachers, what subject do you teach?A. PhysicsB. ChemistryC. BiologyD. Earth ScienceE. General Science

Where does electrolysis fit into your classroom scope and sequence?

Type your responses in the chat box.

What are you hoping to get out of tonight’s web seminar?

Overview of Session1. What this lesson teaches, where to find lesson2. Introduction/prep to the Breath of Fresh Air lab

activity3. Suggestions for teaching concepts and presenting lessons:

- How to introduce the lesson- Performing the experiment- Analyzing results, discussion

4. Extensions and resources for implementing

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Have you heard of NASA Explorer Schools?

√ Yes

NASA Explorer Schools

NASA Explorer School Virtual Campus

http://explorerschools.nasa.gov

How many of you have taught electrolysis in the classroom?

Raise your hand if you have.

Have you used NASA lessons in your classroom?

√ YesX No

Subject Areas

Subject Area:AP ChemistryGrade Level:

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Electrolysis of Water: Breath of Fresh Air

Lesson• AP Chemistry• Lab Activity and Free-Response

Question• Key Topic: Electrolysis of Water

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This lesson features:• Educator edition with answer key• Student edition• NASA Explorer Schools site

http://explorerschools.nasa.gov

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National Standards• National Science Education Standards

– Science Standards– Physical Science– Science and Technology– History and Nature of Science

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Learning ObjectivesIn the lab activity A Breath of Fresh Airstudents will:• construct an electrolytic cell;• determine the number of moles and mass of oxygen

produced;• determine the number of electrons transferred; and• compare their experimental electrolytic cell to the Oxygen

Generator System used on the International Space Station.

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In the FRQ Oxygen Generator Systemstudents will:• write balanced equations for half reactions;• predict direction of oxidation-reduction reactions; and• determine mass and volume relationship with an

emphasis on mole concepts.

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Learning Objectives

Check for Understanding1. What does this lesson teach/objectives?2. Where can you download the educator

guide/lesson?

√ = Yes, I can answer these questions!

X = No, I need further clarification.

How many nations are involved in the building and support of the International

Space Station? A. 5B. 16C. 21D. 3

Quick Quiz Question - QQQ

Questions?

NASA Connections and the Classroom

Past to Present

Regenerative Environmental Control and Life Support System Diagram

The NASA ConnectionElectrolysis is used on the International Space Station as part of the Environmental Control and Life Support Systems.

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Diagram depiction of the electrolysis process used in the OGS system in one of the multiple electrolytic cells

Prototype ECLSS Racks

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Oxygen Generator System

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ISS Expedition 30

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Exploration Water Recovery System

View of surface tension demonstration on board the International Space Station

Beakers contain fluids from various stages of water processing

International Space Station Environment

What is the International Space Station, ISS?

A. An orbiting multidisciplinary laboratoryB. A space shuttleC. A large space outpost that houses 20

astronauts

Questions?

A Breath of Fresh AirLesson Info

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The lab activity A Breath of Fresh AirRequires one 90-minute class period or two 50-minute class periods. Day 1: Go through the background information with

students, have them answer the pre-lab questions and have them set up for the lab.

Day 2: Have students complete the lab and the analysis questions.

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Class Time Required

Class Time RequiredThe FRQ Oxygen Generator System

Requires 45 – 60 minutes, part of which could be assigned for homework.• Can be used as a follow-up assessment for the lab

activity at the end of the unit or even shortly before the AP exam to remind students of the learning.

• Can also be used as a stand-alone activity for those who do not have the required technology to run the lab.

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Technology UsedThe lab activity A Breath of Fresh Air

Requires the use of TI-Nspire technology. Each lab station will need at least one TI-Nspirehandheld with a Vernier Easylink cable, VernierCurrent probe and DC source.

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The FRQ Oxygen Generator System Requires only the use of a standard calculator.

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Technology Used

Equipment Used for Lab• TI-Nspire Handheld, Vernier Current

Probe, Vernier EasyLink• Electrolysis Apparatus - can use a hofman

tube or two graduated gas tubes and electrodes in a beaker

• Three wires with alligator clips• 9-12 V DC power source (< 0.5

amperage)

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TI-Nspire Handheld CX Touchpad Clickpad

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VernierCurrent Probe and EasyLink

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DC Source

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Chemicals Used for LabPotassium HydroxideEach lab station will need to create 100mL of 3% KOH solution by dissolving 3g of KOH in 97g of water.

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Safety Precautions• Students should wear safety goggles and

aprons. • Students should avoid physical contact with

potassium hydroxide. Potassium hydroxide is a toxic, corrosive material that causes severe burns to skin, eyes, respiratory tract, and gastrointestinal tract. Refer to MSDS sheet when using this material with your students.

• Students should avoid contact with any bare metal in the electrical circuit.

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Common Misconceptions

What are some common misconceptions your students may

have about electrolysis?

Type one idea into the chat window.

Why reuse water?

Why reuse water aboard the ISS?Why reuse water here on Earth?

Type a response for each into the chat box.

How often does the ISS orbit the Earth?

A. Once every hourB. Once every hour and a halfC. Once every three hours

Questions?

A Breath of Fresh AirLab Activity

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Engage• Connect activity to previous learning• Read through background section with

students encouraging discussion• Show students the video of interview

with ETHOS flight controller

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Pre-Lab Questions and Lab Set-Up

• Open tns file on handhelds • Complete pre-lab questions• Set-up lab• If 60-minute class or shorter, this is a good

stopping point.

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Pre-Lab Questions• Students will open tns file that you have

distributed to their TI-Nspire handhelds.• Students then complete pre-lab questions.• Students can answer all questions using

their handhelds or they may answer the questions on the provided student edition.

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Lab Set-Up• Once students are finished with pre-lab

questions, they can then set-up their lab station.

• Project lab set-up diagram and walk through the set-up with the students.

• If 60-minute class or shorter, this is a good stopping point.

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Electrolysis Station Set-up NASAExplorerSchools

In the ClassroomNASAExplorerSchools

Lab Activity• As students work on the lab, encourage discussion

on what is happening.• Some questioning you might ask as you monitor:

Which one is oxygen? Which one is hydrogen? Which electrode is positive lead, which is negative?

• Once students have collected the data from the lab, they can work with their partners on the analysis section.

• Although one handheld was used for collection, all students in each group use their handhelds to complete the assignment.

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Wrap-up of Lab• Discuss learning that occurred from the

experience• Reinforce the NASA connection• Discuss possible reasons for error• Discuss any interdisciplinary connections

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Oxygen Generator FRQ

(Free Response Question)

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• Format very similar to free-response questions on AP exams

• Can be used as a follow up to the lab or as a stand-alone problem

• Scoring guide provided that is also very similar to what students will see on the AP exam

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FRQ Scoring Guide

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How might you use journaling and note taking during this lesson?

Please type your ideas into the chat window.

If you have taught electrolysis in the classroom before – what other types

of lessons do you use?

Please type your ideas into the chat window.

Extensions

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Math and Science @ Work Project• More AP Chemistry activities as well as

activities for Physics, Biology, Calculus, and Statistics can be found at the Math and Science @ Work website:www.nasa.gov/education/mathandscience

• Just search by subject and scroll down until you find the activities you are looking for

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TI Science Nspired• TI Nspire is a handheld that can contain documents with

data collection, simulations, assessment, and yes, calculator functionality.

• TI Nspire is also software that can be used in the same way as the handheld but also for writing reports from the data gathered.

• Activities for TI-Nspire can be found in two different locations. (NASA and TI)

• Activities are available for chemistry, physics, and biology as well as all math topics.

• TI Science Nspired website:www.education.ti.com/calculators/tisciencenspired/

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NASA Explorer Schools

http://explorerschools.nasa.gov/

NASA Now Videos

• NASA Now: International Space Station Payload Operations

• NASA Now: Expedition 27

• NASA Now: Human Research on the ISS

NASA ResourcesISS Sightingshttp://spaceflight.nasa.gov/realdata/sightings/index.html

Space Station Research for Teachershttp://www.nasa.gov/mission_pages/station/research/research_teacher.html

Saturday Morning Sciencehttp://spaceflight.nasa.gov/station/crew/exp6/spacechronicles_videos.html

Questions?

International Space Station Tour (Part II)Oxygen Generator System

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CollaborationMaking Teaching Easy

NEON - NASA Educators Online Networkhttp://neon.intronetworks.com/#

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Thank you for joining us!

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Thank you to the sponsor of tonight's Web Seminar:

This web seminar contains information about programs, products, and services offered by third parties, as well as links to third-party websites. The presence of a listing or such information does not constitute an endorsement by NSTA of a

particular company or organization, or its programs, products, or services.

http://learningcenter.nsta.org

National Science Teachers AssociationDr. Francis Q. Eberle, Executive Director

Zipporah Miller, Associate Executive Director Conferences and Programs

Al Byers, Assistant Executive Director e-Learning

LIVE INTERACTIVE LEARNING @ YOUR DESKTOP

NSTA Web SeminarsPaul Tingler, Director

Jeff Layman, Technical CoordinatorBrynn Slate, Program Coordinator

NES: Electrolysis of Water: A Breath of Fresh Air...The lab activity A Breath of Fresh Air Requires...

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