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|OTP appearance||white solid|
|Enthalpy of Formation(kJ/mol)||−987|
|Solubility in water(g/L)||1.73|
|Solubility in ethanol(g/L)||non|
- Calcium hydroxide does not occur naturally.
- Calcium hydroxide is alkaline. It can irritate the skin, eyes and lungs and should not be ingested in large quantities. Wash with fresh clean water after contact.
From calcium oxide
In ideal conditions (distilled water, pure calcium oxide) this works. Presuming a "part by mass" is 1g, this yields half a mol (37g) of calcium hydroxide.
- Gather a watertight container resistant to alkaline substances
- Gather 9 parts by mass of water
- Gather 28 parts by mass of calcium oxide
- Place the water in the container
- Slowly add the calcium oxide, allowing the water to cool in between additions
- The mixture is calcium hydroxide
- Calcium hydroxide is a caustic alkali, so glass and ceramic containers are excellent. Aluminum in particular is bad.
- Calcium hydroxide will absorb carbon dioxide from the air and precipitate as calcium carbonate, so keep in a sealed container