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How Hard is Your Water? Student Laboratory Kit

By: John G. Little, St. Mary's High School, Stockton, CA

Item #: FB0411 

Price: $25.10

In Stock.

How Hard is Your Water? Laboratory Kit for environmental science contains an investigation of your of the level of hardness in your local water. Test and measure your local water supply.

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Product Details

What exactly are the film-like deposits left on glassware in your laboratory and pots and pans at home? Those whitish deposits are actually residues of calcium and magnesium salts found in water. As these compounds become more numerous, the “hardness” of your water becomes higher. In this kit, the level of hardness in your local water supply will be tested and measured. Kit includes reproducible student handouts, a detailed background section, complete teacher notes, tips, sample data, answers to questions, and all of the chemicals needed to perform the lab.Complete for 30 students working in pairs.


Materials Included in Kit: 
Ammonia/Ammonium chloride buffer, pH 10, 150 mL
Calmagite solution, 0.1%, 50 mL
EDTA solution, 0.01 M, 250 mL
Pipet, Beral-type, extra fine tip, 15
Pipet, Beral-type, thin stem, 15

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Analyzing and interpreting data
Developing and using models
Planning and carrying out investigations

Disciplinary Core Ideas

MS-PS1.A: Structure and Properties of Matter
MS-PS1.B: Chemical Reactions
MS-ESS2.C: The Roles of Water in Earth’s Surface Processes
HS-PS1.A: Structure and Properties of Matter

Crosscutting Concepts

Structure and function

Performance Expectations

MS-PS1-2. Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.
HS-PS1-1. Use the periodic table as a model to predict the relative properties of elements based on the patterns of electrons in the outermost energy level of atoms.
HS-ESS2-5. Plan and conduct an investigation of the properties of water and its effects on Earth materials and surface processes.