Question: 4. For a surface water sample, we measured the water quality that shows pH=6.5, alkalinity=250 mg/L as CaCO3, hardness=150 mg/L as CaCO3, TDS=50 mg/L; temperature=298

4. For a surface water sample, we measured the water quality

4. For a surface water sample, we measured the water quality that shows pH=6.5, alkalinity=250 mg/L as CaCO3, hardness=150 mg/L as CaCO3, TDS=50 mg/L; temperature=298 k; Ca2+=100 mg/L. please calculate (1) Langelier index; (2) Aggressive Index; (3) Ryznar Index. Then, determine if water is corrosive or tend to form scale

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