Problem

Shown below are the results of water quality analyses of Crater Lake at Mount Mazama, Oreg...

Shown below are the results of water quality analyses of Crater Lake at Mount Mazama, Oregon. If the water is treated with 40.00 mg/L of alum for turbidity coagulation, how much alkalinity will remain? Assume all the alkalinity is .

Crater Lake, Mount Mazama, Oregon

Constituent

Expressed as

Milligrams per liter

Total hardness

CaCO3

28.0

Calcium hardness

CaCO3

19.0

Magnesium hardness

CaCO3

9.0

Total iron

Fe

0.02

Sodium

Na

11.0

Total alkalinity

CaCO3

29.5

Chloride

Cl

12.0

Sulfate

SO4

12.0

Silica

SiO2

18.0

Total dissolved solids

 

83.0

pHa

 

7.2

aNot in mg/L.

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