A titration-based chemical test kit that determines the alkalinity concentration in samples within a 0 to 100 mg/L (ppm) CaCO3 or 0 to 300 mg/L CaCO3 range.
A titration-based chemical test kit that determines the alkalinity concentration in samples within a 0 to 100 mg/L (ppm) CaCO3 or 0 to 300 mg/L CaCO3 range.
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This chemical test kit measures measures alkalinity by titration with hydrochloric acid. It is supplied complete with everything needed to perform approximately 110 tests.
Features
Applications
Alkalinity is the quantitative capacity of a water sample to neutralize an acid to a set pH. This measurement is very important in determining the corrosive characteristics of water due primarily to hydroxide, carbonate, and bicarbonate ions. Other sources of alkalinity can be from anions that can be hydrolyzed such as phosphates, silicates, borates, fluoride, and salts of some organic acids. Alkalinity is critical in the treatments of drinking water, wastewater, boiler and cooling systems, and soils.
Alkalinity can be measured as Phenolphthalein Alkalinity and Total Alkalinity. The Phenolphthalein Alkalinity is determined by neutralizing the sample to a pH of 8.3 using a dilute hydrochloric acid solution and a phenolphthalein indicator. This process converts hydroxide ions to water, and carbonate ions to bicarbonate ions:
OH- + HCl → H2O + Cl- CO32- + HCl → HCO3- + Cl-
Since bicarbonate ions can be converted to carbonic acid with additional hydrochloric acid, the Phenolphthalein Alkalinity measures total hydroxide ions, but only half of the bicarbonate contribution. To completely convert the carbonate ions, hydrochloric acid is added until the sample pH is 4.5, which is known as Total Alkalinity:
HCO3- + HCl → H2CO3 + Cl-
| Range | 0 to 100 mg/L (ppm) CaCO3; 0 to 300 mg/L (ppm) CaCO3 | |
| Resolution | 1 mg/L (0 to 100 mg/L range) 3 mg/L (0 to 300 mg/L range) | |
| Method | Acid titration using phenolphthalein and bromophenol blue | |
| Number of Tests | 110 | |
| CTK Type | Titration |
| Range | 0 to 100 mg/L (ppm) CaCO3; 0 to 300 mg/L (ppm) CaCO3 | |
| Resolution | 1 mg/L (0 to 100 mg/L range) 3 mg/L (0 to 300 mg/L range) | |
| Method | Acid titration using phenolphthalein and bromophenol blue | |
| Number of Tests | 110 | |
| CTK Type | Titration |
