The solubility of anhydrous calcium nitrate in water is 1212 grams per liter at 20 degrees Celsius.
Calcium nitrate (Ca(NO₃)₂) is a highly water-soluble inorganic compound, widely recognized for its diverse applications. Its excellent solubility makes it a valuable substance in various industries, from agriculture to construction. This characteristic high solubility means that a significant amount of calcium nitrate can dissolve in water, forming a clear solution.
Key Aspects of Calcium Nitrate Solubility
The solubility of calcium nitrate, especially in its anhydrous form, is notably high. For instance, at a standard temperature of 20 degrees Celsius, 1212 grams of anhydrous calcium nitrate can dissolve in one liter of water. This high solubility is a crucial property for its effective use in many contexts.
Factors Influencing Solubility
While calcium nitrate is inherently highly soluble, several factors can influence the exact amount that dissolves in a given volume of water:
- Temperature: Solubility generally increases with temperature for most solids. As water temperature rises, it typically allows for more calcium nitrate to dissolve.
- Form of Calcium Nitrate: Calcium nitrate can exist in anhydrous (water-free) form or various hydrated forms (e.g., tetrahydrate, Ca(NO₃)₂·4H₂O). The solubility figures can vary slightly between these different forms due to differences in their molecular weight and crystal structures, though all forms exhibit high solubility. The specific solubility value provided pertains to the anhydrous form.
Solubility Data Summary
Here's a quick overview of the solubility of anhydrous calcium nitrate:
| Form | Temperature | Solubility (grams per liter) |
|---|---|---|
| Anhydrous | 20°C (68°F) | 1212 |
Practical Applications of Soluble Calcium Nitrate
The high solubility of calcium nitrate is leveraged in numerous practical applications:
- Fertilizers: It is a common source of both nitrogen and calcium for plants, particularly in hydroponics and fertigation systems, where quick dissolution and nutrient availability are essential.
- Concrete Admixtures: In construction, calcium nitrate acts as an accelerating admixture, speeding up the setting time of concrete. Its solubility ensures even distribution within the concrete mix.
- Wastewater Treatment: It can be used in wastewater treatment processes to control odors and reduce hydrogen sulfide emissions by providing an oxygen source for anaerobic bacteria.
- Cooling Systems: Due to its ability to absorb heat and its high solubility, it can be used in some cooling brines.
For more general information on calcium nitrate, you can refer to comprehensive chemical databases like PubChem.
