Calcium hydroxide - Revision history

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-'''Calcium Hydroxide''' is an inorganic compound with the chemical formula Ca(OH)2. It is a colorless crystal or white powder and is obtained when [[calcium oxide]] (also called quicklime) is mixed, or "slaked" with water. It has many names including hydrated lime, caustic lime, builders' lime, slack lime, cal, or pickling lime. Calcium hydroxide is used in many applications, including food preparation, where it is an ingredient in the process of making corn tortillas.
+{{Short description|Chemical compound}}
-==Chemical Properties==
+'''Calcium hydroxide''', traditionally called '''slaked lime''', is an inorganic compound with the chemical formula Ca(OH)₂. It is a colorless crystal or white powder and is obtained when [[calcium oxide]] (quicklime) is mixed, or "slaked" with water. It has many names including hydrated lime, caustic lime, builders' lime, slack lime, cal, or pickling lime. Calcium hydroxide is used in many applications, including food preparation, construction, and chemical processes.
-==Uses==
+==Properties==
-Calcium hydroxide has a wide variety of uses, including as a pH modifier in industrial wastewater control and as a reagent in flue gas desulfurization. It is also used in the production of [[mortar]] that is used in construction and maintenance of buildings. In food preparation, it is used in the process of making corn tortillas, and in the process of making sugar from sugar beets.
+Calcium hydroxide is a soft, white, powdery solid with a slightly bitter taste. It is sparingly soluble in water, with a solubility of about 1.5 g/L at 25 °C. The solution is called lime water, and it is a medium strength base that reacts with acids to form salts. The solubility decreases with increasing temperature, which is unusual for most salts.
 ==Safety==
-Calcium hydroxide is not considered very toxic. However, prolonged contact with skin or eyes can cause severe irritation. If swallowed, it can cause severe digestive discomfort. It is always recommended to handle calcium hydroxide with appropriate safety equipment.
+Calcium hydroxide is considered to be a low hazard material, but it can cause skin irritation and eye damage upon contact. It is important to handle it with care and use appropriate protective equipment.
-==See Also==
+==Related pages==
 * [[Lime (material)]]
-* [[Calcium oxide]]
+* [[Nixtamalization]]
-* [[Lime water]]
+* [[Mortar (masonry)]]
 [[Category:Calcium compounds]]
 [[Category:Hydroxides]]
-[[Category:Alkalis]]
+[[Category:Food additives]]
-{{Chemistry-stub}}
+[[Category:Building materials]]

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2025-02-18T04:38:51Z

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← Older revision		Revision as of 04:38, 18 February 2025
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	File:Nixtamalized_Corn_maize_El_Salvador_recipe.jpg\|Nixtamalized corn, a process involving calcium hydroxide		File:Nixtamalized_Corn_maize_El_Salvador_recipe.jpg\|Nixtamalized corn, a process involving calcium hydroxide
	File:Dying_Gaul_(casting_in_Pushkin_museum)_04_by_shakko.jpg\|Sculpture casting, possibly related to calcium hydroxide in the casting process		File:Dying_Gaul_(casting_in_Pushkin_museum)_04_by_shakko.jpg\|Sculpture casting, possibly related to calcium hydroxide in the casting process
			</gallery>
			<gallery>
			File:Calcium_hydroxide.jpg\|Calcium hydroxide
			File:Mg(OH)2Xray.jpg\|X-ray diffraction pattern of magnesium hydroxide
			File:CaOH2SEM.jpg\|Scanning electron microscope image of calcium hydroxide
			File:Nixtamalized_Corn_maize_El_Salvador_recipe.jpg\|Nixtamalized corn maize from El Salvador
			File:Dying_Gaul_(casting_in_Pushkin_museum)_04_by_shakko.jpg\|Dying Gaul sculpture casting in Pushkin museum
	</gallery>		</gallery>

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2025-02-18T04:06:02Z

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← Older revision		Revision as of 04:06, 18 February 2025
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	[[Category:Alkalis]]		[[Category:Alkalis]]
	{{Chemistry-stub}}		{{Chemistry-stub}}
			==Calcium_hydroxide==
			<gallery>
			File:CaOH2SEM.jpg\|Scanning electron microscope image of calcium hydroxide
			File:Nixtamalized_Corn_maize_El_Salvador_recipe.jpg\|Nixtamalized corn, a process involving calcium hydroxide
			File:Dying_Gaul_(casting_in_Pushkin_museum)_04_by_shakko.jpg\|Sculpture casting, possibly related to calcium hydroxide in the casting process
			</gallery>

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2024-03-03T14:36:09Z

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New page

'''Calcium Hydroxide''' is an inorganic compound with the chemical formula Ca(OH)2. It is a colorless crystal or white powder and is obtained when [[calcium oxide]] (also called quicklime) is mixed, or "slaked" with water. It has many names including hydrated lime, caustic lime, builders' lime, slack lime, cal, or pickling lime. Calcium hydroxide is used in many applications, including food preparation, where it is an ingredient in the process of making corn tortillas.

==Chemical Properties==
Calcium hydroxide is a soft white powdery substance with a slight earthy smell and an alkaline taste. It is insoluble in alcohol but slightly soluble in water to give a solution known as [[lime water]]. When heated to 512°C, the partial pressure of water in equilibrium with calcium hydroxide reaches 101 kPa (standard atmospheric pressure), which decomposes calcium hydroxide into [[calcium oxide]] and water.

==Uses==
Calcium hydroxide has a wide variety of uses, including as a pH modifier in industrial wastewater control and as a reagent in flue gas desulfurization. It is also used in the production of [[mortar]] that is used in construction and maintenance of buildings. In food preparation, it is used in the process of making corn tortillas, and in the process of making sugar from sugar beets.

==Safety==
Calcium hydroxide is not considered very toxic. However, prolonged contact with skin or eyes can cause severe irritation. If swallowed, it can cause severe digestive discomfort. It is always recommended to handle calcium hydroxide with appropriate safety equipment.

==See Also==
* [[Lime (material)]]
* [[Calcium oxide]]
* [[Lime water]]

[[Category:Chemical compounds]]
[[Category:Calcium compounds]]
[[Category:Hydroxides]]
[[Category:Alkalis]]
{{Chemistry-stub}}

← Older revision		Revision as of 04:38, 18 February 2025
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	File:Nixtamalized_Corn_maize_El_Salvador_recipe.jpg\|Nixtamalized corn, a process involving calcium hydroxide		File:Nixtamalized_Corn_maize_El_Salvador_recipe.jpg\|Nixtamalized corn, a process involving calcium hydroxide
	File:Dying_Gaul_(casting_in_Pushkin_museum)_04_by_shakko.jpg\|Sculpture casting, possibly related to calcium hydroxide in the casting process		File:Dying_Gaul_(casting_in_Pushkin_museum)_04_by_shakko.jpg\|Sculpture casting, possibly related to calcium hydroxide in the casting process
			</gallery>
			<gallery>
			File:Calcium_hydroxide.jpg\|Calcium hydroxide
			File:Mg(OH)2Xray.jpg\|X-ray diffraction pattern of magnesium hydroxide
			File:CaOH2SEM.jpg\|Scanning electron microscope image of calcium hydroxide
			File:Nixtamalized_Corn_maize_El_Salvador_recipe.jpg\|Nixtamalized corn maize from El Salvador
			File:Dying_Gaul_(casting_in_Pushkin_museum)_04_by_shakko.jpg\|Dying Gaul sculpture casting in Pushkin museum
	</gallery>		</gallery>