- Problems 11 And 12 Please 1 (32.86 KiB) Viewed 21 times
Problems 11 and 12 Please.
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answerhappygod
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Problems 11 and 12 Please.
Problems 11 and 12 Please.
11. (20 points) Calculate the hardness and alkalinity (in mg/L as CaCO3) in a solution with the following compositions (all except pH in mM): pH = 10.3, Ca²+ = 4.0, Mg²+ = 1.0, Nat=2, HCO3 =2, CO3²- = 2, Cl- = 6? 12. (15 points) What is the maximum amount (in mg/L) of alum Al2(SO4)3(s) that can be added to a water with an alkalinity of 200 mg/L as CaCO3 to avoid depression of the pH without adding additional alkalinity?
11. (20 points) Calculate the hardness and alkalinity (in mg/L as CaCO3) in a solution with the following compositions (all except pH in mM): pH = 10.3, Ca²+ = 4.0, Mg²+ = 1.0, Nat=2, HCO3 =2, CO3²- = 2, Cl- = 6? 12. (15 points) What is the maximum amount (in mg/L) of alum Al2(SO4)3(s) that can be added to a water with an alkalinity of 200 mg/L as CaCO3 to avoid depression of the pH without adding additional alkalinity?