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Innovating Science™ AP Chemistry Kits: Water Hardness
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Catalog No. S90745 Shop All Aldon Products
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Catalog No. S90745 Supplier Innovating Science™ Supplier No. IS8020
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Description

Includes

Materials for 15 groups: 500mL EDTA solution, 0.005M (4); 200mL Buffer solution (2); 15mL EBT (Eriochrome Black, 0.1%) solution UN 1219 (2); teacher's guide; and student copy masters

Students test for water hardness.

Tap water contains various amounts of ions such as calcium, iron, magnesium, etc. The higher the concentration, the “harder” the water is; hard water is characterized by the inability of soap to form lather and the formation of “scum” in sinks and bathtubs.
A sample of tap water is treated with EBT indicator. If the indicator turns from blue to pink, metal ions such as calcium and magnesium are present. To determine the concentration of ions present, the sample is titrated with a known molar concentration of EDTA.

Specifications

Certifications/Compliance 49 CFR 173.4
Color White
Grade 7 to 14
Age 13 to 20
For Use With (Application) Used to signal the presence of ions in the water sample
Includes 4 x 500ml 0.005m edta solution, 2 x 200ml buffer solution, 2 x 15ml ebt solution (eriochrome black, 0.1%), teacher's guide and student study guide copymasters
Quantity 1
Dimensions (L x W x H) 7.25 x 7.25 x 8.375 in.
Class Size 15 Lab Groups
Product Type Water Hardness Chemistry Kit
Product Title
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