What is Ca(OH)2 and How is it Used?
The chemical name for the compound is calcium hydroxide. It is also called as slaked lime. It is prepared by mixing calcium oxide with water. The molecular mass is 74.093 g/mol. When carbon dioxide react with calcium hydroxide to form calcium carbonate which turn lime water milky. It appear white powder in solid-state and appear colourless in crystalline form. It is odorless, slightly soluble in water, possessing an alkaline, bitter taste. The solubility decreases with increase in temperature.
It react with a acid to form salts and water. If calcium hydroxide get into lungs ,permanent lung damange can occur. It causes loss of vision.
Uses:
• Sewage treatment
- Converting wood into pulp
- Preparing ammonia
- Pesticides
- In production of soap
- Separating fur from hides
FAQ
i) Give a reaction of Calcium hydroxide with Carbon dioxide.
Ans: It forms calcium carbonate.
Eq: Ca(OH)2 + CO2 –> CaCO3 + H2O
ii) Give two more uses of it.
Ans: • pH modifier
- While processing of sugar beets and sugarcane
iii) What is the solubility product of calcium hydroxide?
Ans: 5.5 × 10^-6
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