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Lesson Plan
American Chemical Society

Using Chemical Change to Identify an Unknown

For Teachers 3rd - 8th
If you have taught the first lesson in this mini unit, learners already know that cabbage juice and vinegar cause chemical changes in some materials. Now, they get a chance to use them to compare the liquids' reactions to five known and...
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Lesson Plan
American Chemical Society

Using the Combining Test to Identify Unknown Liquids

For Teachers 3rd - 8th
Once investigators have learned how their mystery liquids interact with water during the preceding activity, they now use their observations to identify them. This is an ideal conclusion to the mini unit on the properties of water. 
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Lesson Plan
2
2
American Chemical Society

Using Chemical Change to Identify an Unknown

For Teachers 6th - 8th Standards
If you discover an unknown powder, how do you determine if it is safe? Lesson uses four different tests to identify the properties of various powders that appear the same. Then scholars get an unknown powder and have to determine which...
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Lesson Plan
Cornell University

Unknown Powders

For Students 3rd - 6th Standards
Create a little scientific magic within your classroom! Learners mix powders and liquids and identify chemical reactions. Based on the reactions, individuals determine the identity of various powders.
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Lab Resource
Pingry School

Qualitative Analysis of Eleven Household Chemicals

For Students 9th - 12th Standards
Chemical and physical properties give compounds an identity. Learners use the identity of a compound to predict what it is. By performing different tests like solubility, flame, heat, and reactions, individuals attempt to identify an...
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Lesson Plan
American Chemical Society

Exploring Baking Powder

For Teachers 3rd - 8th
Meant to follow an activity in which young chemists identified an unknown substance by chemical reactions, they now take their data and use it to determine which materials combine to make up baking powder. This lesson is one that can be...
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Lesson Plan
Curated OER

Up and Atom

For Teachers 7th - 8th
"Up and Atom" is a mini-unit introducing middle-schoolers to the wonders of elements. Participants draw atom models, examine the periodic table, compare samples of metals to nonmetals, identify unknown elements, and more! The beginning...
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Lesson Plan
2
2
American Chemical Society

Using Dissolving to Identify an Unknown

For Teachers 6th - 8th Standards
There is a solvent called aqua regis that can dissolve gold! After observing a solubility demonstration, groups receive four known crystals and one unknown. Based on the demo, they design an experiment to determine the identity of the...
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Assessment
Curated OER

2001 U.S. National Chemistry Olympiad Part III

For Students 9th - 12th
Here is a comprehensive method for assessing chemistry learners' knowledge; have them approach two laboratory problems, plan their methods of solving each, and then actually carry out the experiments to find the answers. Both the...
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Lesson Plan
Curated OER

The Case of Similar Substances

For Teachers 6th - 8th
Students perform tests in the lab to identify an unknown substance. In this physical science lesson, students observe the physical and chemical properties of substances. They formulate a conclusion based on experimental results.
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Lesson Plan
Curated OER

Ashes to Ashes: Using Evaporation Rate to Identify an Unknown Liquid

For Teachers 9th - 12th Standards
Learners explore the concept of evaporation rates in this evaporation rates lesson. They will try to identify the chemical that began a fire, perform an experiment where they use the evaporation rates to determine the unknown liquid, and...
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Lesson Plan
Curated OER

Color, Light, and Excited Electrons

For Teachers 9th - 12th
Investigate color, light and excited electrons and produce waves using slinkys. Your high schoolers will observe a continuous spectrum with a prism and an overhead projector. They observe flame tests to identify elements and they observe...
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Lesson Plan
Curated OER

How Can You Tell One Clear Gas From Another?

For Teachers 5th
Fifth graders perform experiments to determine the identity of an unknown gas sample. In this chemistry instructional activity, 5th graders fill balloons with air, oxygen, hydrogen, and carbon dioxide. They use mass and reactivity to...
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Lesson Plan
1
1
Science 4 Inquiry

Bubbles and Colors and Smells...Oh My!

For Teachers 6th - 8th Standards
A demonstration of elephant toothpaste hooks pupils' interest as they complete multiple experiments with colors, smells, bubbles, and more. By the end, they understand the differences between physical and chemical changes in the world...
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Lesson Plan
American Chemical Society

Solubility Test

For Teachers 3rd - 8th
Make sure to consult the teacher's handbook, Inquiry in Action - Investigating Matter Through Inquiry, for two demonstrations that can be done to introduce solubility and measuring crystal mass before having the class conduct this...
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Lesson Plan
Curated OER

Confectionary Bureau of Investigations: Case of the Cookie Mystery

For Teachers 9th - 12th
Learners perform tests on different chemicals to determine their chemical properties. In this forensic science lesson, students identify an unknown sample using its physical and chemical properties. They solve a fictional crime using...
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Lesson Plan
Curated OER

The Scientific Method Using Mystery Powders

For Teachers 6th - 11th
Students use the scientific method to determine physical and chemical properties of unknown substances. For this scientific method lesson plan, students discuss chemical and physical properties of substances as a class after a...
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Lesson Plan
Virginia Department of Education

Mystery Anions

For Teachers 9th - 12th Standards
Lost an electron? You should keep an ion them. Young chemists learn qualitative analysis in the second lesson plan of an 11-part chemistry series. After observing reactions of simple salts, the teacher provides pupils with unknown...
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Activity
1
1
Teach Engineering

Flame Test: Red, Green, Blue, Violet?

For Teachers 10th - 12th Standards
Let the true colors shine through. Pupils conduct a flame test to identify an unknown element. Class members calculate and prepare specific molarity solutions of three chemicals. Using their observations of the colors emitted, they...
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Lesson Plan
1
1
Beyond Benign

Packed Up Properties

For Students 6th - 8th
Determine physical properties of potential packaging materials. Continuing from previous lessons in the series, the resource asks groups to identify physical properties of the substances. They test for conductivity, solubility, water...
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Worksheet
Curated OER

Naming and Writing Chemical Formulae-I

For Students 9th - 12th
In this naming and writing chemical formulas worksheet, students are given directions and practice writing simple chemical formulas. They identify positive and negative valence elements, they name nonmetal compounds, they name compounds...
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Interactive
Chemistry Collective

Virtual Lab: Textbook Style Limiting Reagents Problem II

For Students 9th - Higher Ed
Textbook problems with a twist! Young chemists analyze an ionic reaction to identify the limiting reagent. They then make calculations to determine the concentration of unknown solutions. Finally, they put their work to the test and...
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Lesson Plan
Curated OER

The Case of Similar Substances

For Teachers 6th - 8th
Middle schoolers solve a crime mystery using chemical tests. They review the crime scenario and then become familiar with the procedure and results for two tests used to identify unknown powders. They perform the tests on the crime...
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Lesson Plan
Curated OER

Unknown Element Project

For Teachers 9th - 12th
Students work with a partner to determine the identity of an unknown element based on given descriptions. Groups use classroom textbooks, encyclopedias, and science internet sites to identify their unknown element then write a report as...