Difference Wiki

Quicklime vs. Hydrated Lime: What's the Difference?

Edited by Huma Saeed || By Sawaira Riaz || Published on December 10, 2023
Quicklime is calcium oxide (CaO), made by heating limestone; hydrated lime is calcium hydroxide (Ca(OH)₂), made by adding water to quicklime.

Key Differences

Quicklime, chemically known as calcium oxide, is a caustic alkaline substance produced by heating limestone in a kiln. Hydrated lime, or calcium hydroxide, is created when water is added to quicklime, leading to a less caustic but still alkaline substance.
Sawaira Riaz
Dec 10, 2023
Quicklime has a high melting point and is used in industrial processes like steel making and waste treatment. Hydrated lime, being more stable and less reactive, is used in building, agriculture, and water treatment.
Sawaira Riaz
Dec 10, 2023
In construction, quicklime is used for soil stabilization and as a component in cement. Hydrated lime, due to its stability and plasticity, is preferred in plaster, mortar, and whitewash.
Huma Saeed
Dec 10, 2023
Quicklime reacts vigorously with water, releasing a significant amount of heat, making it hazardous to handle without proper safety measures. Hydrated lime, though safer to handle, still requires caution as it can cause skin and eye irritation.
Sawaira Riaz
Dec 10, 2023
Quicklime is more caustic and has a higher pH than hydrated lime, making it more effective in certain industrial applications. Hydrated lime, with a lower pH, is more suitable for environmental and agricultural uses.
Sawaira Riaz
Dec 10, 2023
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Comparison Chart

Chemical Formula

CaO
Ca(OH)₂
Sawaira Riaz
Dec 10, 2023

Production

Produced by heating limestone
Created by adding water to quicklime
Sawaira Riaz
Dec 10, 2023

Uses

Steel making, soil stabilization
Plaster, mortar, agriculture
Sawaira Riaz
Dec 10, 2023

Reactivity

Highly reactive with water
Less reactive, safer to handle
Harlon Moss
Dec 10, 2023

PH Level

Higher pH, more caustic
Lower pH, less caustic
Aimie Carlson
Dec 10, 2023
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Quicklime and Hydrated Lime Definitions

Quicklime

A compound used for environmental applications like waste treatment.
Quicklime helped neutralize the acidic industrial waste.
Janet White
Nov 22, 2023

Hydrated Lime

Calcium hydroxide, commonly used in building materials.
The masons used hydrated lime for the new mortar mix.
Huma Saeed
Nov 22, 2023

Quicklime

A material used in building for soil stabilization.
Quicklime was essential in the road construction project.
Aimie Carlson
Nov 22, 2023

Hydrated Lime

A less reactive form of lime used in environmental applications.
Hydrated lime was utilized in the water purification process.
Aimie Carlson
Nov 22, 2023

Quicklime

A white, caustic, alkaline substance consisting of calcium oxide.
Quicklime was used to improve the soil's pH balance.
Sawaira Riaz
Nov 22, 2023

Hydrated Lime

A dry, colorless crystalline powder used in various applications.
Hydrated lime was added to the paint to enhance its durability.
Sawaira Riaz
Nov 22, 2023

Quicklime

Calcium oxide formed by calcining limestone.
The kiln produced quicklime for industrial applications.
Harlon Moss
Nov 22, 2023

Hydrated Lime

An alkaline material used in construction and manufacturing.
Hydrated lime was chosen for plastering the historic building.
Sawaira Riaz
Nov 22, 2023

Quicklime

A reactive chemical used in construction and industry.
Quicklime's heat generation is crucial in metal processing.
Harlon Moss
Nov 22, 2023

Hydrated Lime

A compound with a variety of uses in agriculture and water treatment.
Hydrated lime proved effective in adjusting the soil acidity.
Sawaira Riaz
Nov 22, 2023

Quicklime

See calcium oxide.
Sawaira Riaz
Nov 19, 2023

Quicklime

Calcium oxide, which is produced by heating (calcining) limestone and gives slaked lime on treatment with water.
Sawaira Riaz
Nov 19, 2023

Quicklime

(transitive) To treat with quicklime.
Sawaira Riaz
Nov 19, 2023

Quicklime

Calcium oxide; unslacked lime; - so called because when wet it develops great heat. See 4th Lime, 2.
Sawaira Riaz
Nov 19, 2023

Quicklime

A white crystalline oxide used in the production of calcium hydroxide
Sawaira Riaz
Nov 19, 2023

FAQs

What are the main uses of quicklime?

Quicklime is used in steel making, soil stabilization, and waste treatment.
Sawaira Riaz
Dec 10, 2023

Is hydrated lime safer than quicklime?

Yes, it’s less caustic and reactive, though still requires caution.
Janet White
Dec 10, 2023

Why is hydrated lime used in construction?

Its stability and plasticity make it suitable for plaster and mortar.
Janet White
Dec 10, 2023

How is hydrated lime made?

Hydrated lime is made by adding water to quicklime, forming calcium hydroxide.
Huma Saeed
Dec 10, 2023

Can hydrated lime be used in agriculture?

Yes, it's used to adjust soil pH and improve soil quality.
Janet White
Dec 10, 2023

Does quicklime have environmental uses?

Yes, it's used in environmental cleanup and waste treatment.
Aimie Carlson
Dec 10, 2023

Can quicklime be used in water treatment?

Yes, but it's more common to use hydrated lime due to safety and control.
Harlon Moss
Dec 10, 2023

What is quicklime?

Quicklime is calcium oxide, a caustic substance produced by heating limestone.
Sawaira Riaz
Dec 10, 2023

Is quicklime dangerous to handle?

Yes, it reacts vigorously with water and can be hazardous.
Aimie Carlson
Dec 10, 2023

What safety measures are needed for handling quicklime?

Protective gear, including gloves and eye protection, is necessary.
Aimie Carlson
Dec 10, 2023

Is quicklime used in agriculture?

It can be, but hydrated lime is more commonly used due to its safety.
Sawaira Riaz
Dec 10, 2023

Can hydrated lime be used in food processing?

Yes, it's used in some food processing applications.
Sawaira Riaz
Dec 10, 2023

What industries use quicklime?

Steel, construction, and environmental management industries use quicklime.
Aimie Carlson
Dec 10, 2023

How does hydrated lime affect soil?

It increases soil alkalinity, making it more suitable for certain crops.
Aimie Carlson
Dec 10, 2023

How is quicklime stored?

It should be stored in a dry, airtight container to prevent reaction with moisture.
Janet White
Dec 10, 2023

Why is hydrated lime used in water purification?

It helps in removing impurities and adjusting the pH of water.
Janet White
Dec 10, 2023

What's the difference in pH between quicklime and hydrated lime?

Quicklime has a higher pH and is more caustic compared to hydrated lime.
Sawaira Riaz
Dec 10, 2023

Can quicklime be converted into hydrated lime?

Yes, by adding water to quicklime, it becomes hydrated lime.
Janet White
Dec 10, 2023

Are there any health risks associated with hydrated lime?

It can cause skin and eye irritation, so proper handling is important.
Sawaira Riaz
Dec 10, 2023

Can both quicklime and hydrated lime be used in the same applications?

Sometimes, but they have different properties and safety considerations.
Harlon Moss
Dec 10, 2023
About Author
Written by
Sawaira Riaz
Sawaira is a dedicated content editor at difference.wiki, where she meticulously refines articles to ensure clarity and accuracy. With a keen eye for detail, she upholds the site's commitment to delivering insightful and precise content.
Edited by
Huma Saeed
Huma is a renowned researcher acclaimed for her innovative work in Difference Wiki. Her dedication has led to key breakthroughs, establishing her prominence in academia. Her contributions continually inspire and guide her field.

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