What is the Difference Between Calcium Chloride and Calcium Chloride Dihydrate?
🆚 Go to Comparative Table 🆚The main difference between calcium chloride and calcium chloride dihydrate lies in the number of water molecules associated with each compound.
- Calcium Chloride (CaCl2): This is an inorganic compound that generally occurs as a hydrated compound, meaning calcium chloride molecules exist in association with water molecules.
- Calcium Chloride Dihydrate (CaCl2·2H2O): This is a specific hydrate form of calcium chloride, containing two water molecules (H2O) per calcium chloride molecule.
Both calcium chloride and calcium chloride dihydrate can be used for various applications, such as preparing buffers. However, when using them for different purposes, it is essential to consider the water content in each compound, as it may affect the desired outcome.
Comparative Table: Calcium Chloride vs Calcium Chloride Dihydrate
Calcium chloride and calcium chloride dihydrate are inorganic compounds with some differences in their chemical structure and properties. Here is a table comparing the two:
Property | Calcium Chloride | Calcium Chloride Dihydrate |
---|---|---|
Chemical Formula | CaCl2 | CaCl2·2H2O |
Molar Mass | N/A (varies depending on hydration) | 111.56 g/mol |
Structure | Molecules exist in association with water molecules | One calcium chloride molecule in association with two water molecules |
Melting Point | N/A (varies depending on hydration) | 175 °C |
Decomposition | N/A (varies depending on hydration) | Decomposes upon further heating |
Natural Occurrence | N/A (varies depending on hydration) | Rare evaporate "sinjarite" |
Hydration State | Anhydrous or partially hydrated | Dihydrate (fully hydrated) |
The key difference between calcium chloride and calcium chloride dihydrate is the number of water molecules associated with the calcium chloride molecules. Calcium chloride is generally found as a hydrated compound, but the level of hydration can vary. Calcium chloride dihydrate, on the other hand, has a fixed hydration state with one calcium chloride molecule associated with two water molecules.
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