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What Makes Water Hard? AP Lab #3 Entomology & Zoology_Zoology Models High impedance 100 kilohm wire wound resistor at High impedance 100 kilohm wire wound resistor at 10 watts and four rotary controls The activity contains enough materials for 15 groups of students as well as a Teacher 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
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What Makes Water Hard? AP Lab #3 Entomology & Zoology_Zoology Models High-impedance 100-kilohm wire-wound resistor at

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