Innovating Science® - APï®® Chemistry Lab #3: What Makes Water Hard?

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Manufacturer ID - IS8103

Students will learn about acids and bases through a class discussion and then test a dilute acid and dilute base with neutral litmus paper to learn how the paper indicates something is acidic or basic. Once that skill is learned they can move on to test some common items that would be found around their house to determine if they are acids or bases. Optional: Extra litmus paper is included to test more items either from home or around the school building for a greater understanding of acids and bases. The activity contains enough materials for 6 groups of students.

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Students will investigate the suitability of gravimetric analysis for determining the amount of water hardness in the form of calcium carbonate found in various water samples. The activity contains enough materials for 15 groups of students as well as a Teacher's Guide and Student Study Guide Copymasters. Meets Big Idea 1, Investigation 3, Primary Learning Objective 1.19.

Kit Includes:
40g Calcium Chloride
50g Sodium Carbonate
500mL Sodium Carbonate 0.5M
2 Filter Paper, pk/100
200mL Water Sample #1 (0.75M Calcium Chloride)
200mL Water Sample #2 (0.2M Calcium Chloride)
200mL Water Sample #3 (0.5M Calcium Chloride)
200mL Water Sample #4 (0.1M Calcium Chloride)
200mL Water Sample #5 (0.05M Calcium Chloride)
200mL Water Sample #6 (0.9M Calcium Chloride)

Materials needed but not supplied:
250mL Beakers
100mL Beakers
100mL Graduated Cylinders
Watch Glasses
Distilled or Deionized Water
Wash Bottles
Analytical Balance(s) (0.001g resolution or better)
Drying Oven
Vacuum filtration setups (aspirators or small vacuum pumps, 250mL Buchner funnels, 250mL Erlenmeyer flasks w/sidearm, ring stands w/ laboratory clamps, rubber tubing, glass tubing, #6 two-hole rubber stoppers, #6 Buchner funnel rubber stoppers)

DOT Info:
Brand Name
Innovating Science®
Performance Expectations 5-PS1-3
Cross Cutting Concepts Cause and Effect
Scale, Proportion, and Quantity
Engineering Practices Planning and Carrying Out Investigations
Box Used 12663SBOX
Width (in) 6.25
Height (in) 4
Weight (oz) 19.9
Weight (lb) 1.24
Country of Origin US
Harmonization Code 9023.00.0000
DOT Description Non regulated

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