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Why does lime expand and get hot when water added to lime?
When water is added to quicklime (calcium oxide), it undergoes an exothermic reaction to form calcium hydroxide (slaked lime). This reaction releases heat, causing the lime to heat up. Additionally, the rapid formation of calcium hydroxide leads to an increase in volume, causing the lime to expand. This combination of heat and expansion can create a vigorous reaction, which is why caution is advised when adding water to quicklime.
Does quick lime produce fire if mixed with water?
Quicklime, also known as calcium oxide, when mixed with water undergoes an exothermic reaction, releasing heat. However, it does not produce fire. The reaction can generate enough heat to cause burns or ignite flammable materials nearby due to the high temperatures reached.
Why was quicklime left exposed before being transported?
Quicklime was left exposed before being transported to allow it to fully react with water and carbon dioxide, forming calcium hydroxide. This process helps stabilize the quicklime and prevents the release of heat during transportation.
Can hdyrated lime revert to quicklime?
No, hydrated lime (calcium hydroxide) is produced when quicklime (calcium oxide) reacts with water. Once this reaction occurs, the chemical properties change, and it cannot revert back to quicklime without undergoing a separate process involving heat (such as calcination).
What is the formula of creating quicklime from limestone?
Quicklime is created from limestone through a process called calcination. The chemical equation for this process is: CaCO3 (limestone) -> CaO (quicklime) + CO2 (carbon dioxide). It involves heating limestone to high temperatures, around 900-1000°C, to drive off the carbon dioxide and produce quicklime.
How is slake lime made?
adding water to quick lime produces slaked lime.
Does quick lime produce fire if mixed with water?
Quicklime, also known as calcium oxide, when mixed with water undergoes an exothermic reaction, releasing heat. However, it does not produce fire. The reaction can generate enough heat to cause burns or ignite flammable materials nearby due to the high temperatures reached.
What happens chemically when quicklime is added to water filled in a bucket?
When quicklime (calcium oxide) is added to water, it undergoes a chemical reaction called slaking to form calcium hydroxide. This reaction releases a significant amount of heat due to the exothermic nature of the reaction. The resulting calcium hydroxide solution is highly alkaline.
Why was quicklime left exposed before being transported?
Quicklime was left exposed before being transported to allow it to fully react with water and carbon dioxide, forming calcium hydroxide. This process helps stabilize the quicklime and prevents the release of heat during transportation.
Can hdyrated lime revert to quicklime?
No, hydrated lime (calcium hydroxide) is produced when quicklime (calcium oxide) reacts with water. Once this reaction occurs, the chemical properties change, and it cannot revert back to quicklime without undergoing a separate process involving heat (such as calcination).
What is the formula of creating quicklime from limestone?
Quicklime is created from limestone through a process called calcination. The chemical equation for this process is: CaCO3 (limestone) -> CaO (quicklime) + CO2 (carbon dioxide). It involves heating limestone to high temperatures, around 900-1000°C, to drive off the carbon dioxide and produce quicklime.
What is meant by slaking of lime?
It is the process of converting CaO to Ca(OH)2 by adding the CaO into water. The reaction is: CaO+H2O ---> Ca(OH)2 This reaction is highly exothermic and releases large amount of heat (63.7 kJoules for 1 mol of CaO used).
Which lime dissolved in water give a hissing sound?
When calcium oxide (quicklime) dissolves in water, it undergoes an exothermic reaction which may produce a hissing sound due to the rapid release of heat and steam. The hissing sound is a result of the quick reaction of the lime with water to form calcium hydroxide.
Water is distilled by evaporating it usually by adding something and bringing it to boil?
Water is distilled by evaporating it, usually by adding heat and bringing it to boil
What is the word equation for slaked lime?
Limestone to quicklime: Calcium carbonate ---heat---> calcium oxide (QUICKLIME) + carbon dioxide Chemical formula: CaCO3 ---heat---> CaO + CO2 Quicklime to slaked lime: Calcium oxide (QUICKLIME) + water ---> calcium hydroxide (SLAKED LIME) Chemical formula: CaO + H20 ---> Ca(OH)2
What is the full cycle of limestone?
The limstone cycle: 1. Limstone (CaCO3) - Heat limestone to produce quicklime 2. Quicklime (CaO) - Add a few drops of water to produce slaked lime 3. Slake lime (Ca(OH)2(s)) - Add excess water to produce Limewater 4. Limewater (Ca(OH)3(aq) ) - Bubble CO2 gas into limewater to produce limestone This is called a cycle because it happens again and again...
How does the limestone cycle work?
Starts off as Calcium Carbonate , when heated the calcium carbonate becomes Calcium Oxide + Carbon Dioxide, the Calcium Oxide then reacts with water to produce Calcium Hydroxide and then when more water is added then filtered it becomes Calcium Hydroxide Solution, C02 is then added to form Calcium Carbonate again [:
