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Battle of the Acids—Strong vs. Weak Acids—Chemical Demonstration Kit

By: The Flinn Staff

Item #: AP6287 

Price: $56.15

In Stock.

With the Battle of the Acids, Strong vs. Weak Acids Chemical Demonstration Kit, compare reactions of acids using our exclusive “rainbow acid” universal indicator. Students’ combined observations build a picture of strong versus weak acids.

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Product Details

Not all acids are created equal! Compare the “frothing and foaming” reaction of two different acids with calcium carbonate using our exclusive “rainbow acid” universal indicator. The indicator produces a rainbow spectrum of color changes in the pH range from 1 to 7. Students build connections linking the rate of reaction to the hydrogen ion concentration and pH scale as they “discover” the properties of strong and weak acids. Repeat the acid battle in the presence of their salts—how does this affect their properties? Students see what it means for reactions to be irreversible or reversible. Observations help students build a complete picture of strong versus weak acids.

Concepts: Strong acid, weak acid, conjugate base, pH.
Time Required: 15 minutes
Chemicals Provided: Hydrochloric acid, acetic acid, calcium carbonate, sodium chloride, sodium acetate, “rainbow-acid” universal indicator.
Note: A large demonstration tray is recommended. See AP5429 for a description of our fiberglass demonstration tray.


Materials Included in Kit: 
Acetic acid, 2 M, 500 mL, 3
Calcium carbonate, 280 g
Hydrochloric acid, 2 M, 500 mL, 3
Sodium acetate, lab grade, 120 g
Sodium chloride, lab grade, 100 g
Universal indicator, rainbow acid, 50 mL
Pipet, Beral-type, graduated, 7

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Developing and using models
Analyzing and interpreting data
Constructing explanations and designing solutions

Disciplinary Core Ideas

MS-PS1.B: Chemical Reactions
MS-PS1.A: Structure and Properties of Matter
HS-PS1.A: Structure and Properties of Matter
HS-PS1.B: Chemical Reactions

Crosscutting Concepts

Systems and system models
Stability and change

Performance Expectations

HS-PS1-2. Construct and revise an explanation for the outcome of a simple chemical reaction based on the outermost electron states of atoms, trends in the periodic table, and knowledge of the patterns of chemical properties.