Transcription of Test 14 Total Hardness - Vernier Software & …
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Test 14 Total Hardness - Vernier Software & …
Computer 14 Water Quality with Vernier 14 - 1 Total Water Hardness INTRODUCTION When water passes through or over deposits such as limestone, the levels of Ca2+, Mg2+, and HCO3 ions present in the water can greatly increase and cause the water to be classified as hard water. This term results from the fact that calcium and magnesium ions in water combine with soap molecules, making it hard to get suds. In Test 13, Calcium and Water Hardness , an Ion-Selective Electrode was used to determine calcium Hardness , in mg/L as CaCO3.
Computer 14 14 - 2 Water Quality with Vernier Table 1: Ca Hardness, Mg Hardness, and Total Hardness in Selected Sites Site (fall season) Ca hardness (mg/L as CaCO3) Mg hardness
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