Ask Difference

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

By Tayyaba Rehman & Fiza Rafique — Published on October 31, 2023
Quicklime is calcium oxide (CaO) produced by heating limestone, while hydrated lime is calcium hydroxide (Ca(OH)₂) made by adding water to quicklime.
Quicklime vs. Hydrated Lime — What's the Difference?

Difference Between Quicklime and Hydrated Lime

ADVERTISEMENT

Key Differences

Quicklime is a white, caustic, alkaline crystalline solid derived from heating limestone (calcium carbonate) to high temperatures. This heating process is called calcination. On the other hand, hydrated lime, also known as slaked lime, results from adding a controlled amount of water to quicklime, a process which hydrates the quicklime and changes its chemical structure.
Tayyaba Rehman
Oct 31, 2023
In the realm of construction, quicklime is known for its property to release a large amount of heat when it reacts with water. This makes it useful in certain applications where heat generation can aid the process. Hydrated lime, on the other hand, is commonly used as a component in mortars and plasters due to its improved workability and reduced setting time.
Tayyaba Rehman
Oct 31, 2023
The manufacturing process of these substances varies significantly. Quicklime is produced directly from the calcination of limestone, where it loses carbon dioxide and turns into a highly reactive material. Conversely, to produce hydrated lime, water is added to the quicklime in a controlled manner, leading to a less reactive compound.
Tayyaba Rehman
Oct 31, 2023
In the industry, the use of quicklime and hydrated lime differs based on their properties. While quicklime can be used in steel manufacturing, water treatment, and flue gas treatment, hydrated lime finds its primary applications in waste treatment, water purification, and construction.
Tayyaba Rehman
Oct 31, 2023
Both quicklime and hydrated lime have distinct safety considerations. Due to its highly exothermic reaction with water, quicklime can cause burns and requires careful handling. Meanwhile, hydrated lime is less caustic but can still cause irritation if it comes into contact with skin or eyes.
Tayyaba Rehman
Oct 31, 2023
ADVERTISEMENT

Comparison Chart

Chemical Composition

Calcium oxide (CaO)
Calcium hydroxide (Ca(OH)₂)
Tayyaba Rehman
Oct 31, 2023

Production

From heating limestone
By adding water to quicklime
Tayyaba Rehman
Oct 31, 2023

Reactivity

Highly reactive with water
Less reactive
Tayyaba Rehman
Oct 31, 2023

Uses

Steel manufacturing, flue gas treatment
Mortars, plasters, water purification
Tayyaba Rehman
Oct 31, 2023

Safety Concerns

Can cause burns due to exothermic reactions
Can cause skin or eye irritation
Tayyaba Rehman
Oct 31, 2023

Compare with Definitions

Quicklime

Used in various industries.
Steel mills incorporate Quicklime in their production process.
Tayyaba Rehman
Oct 04, 2023

Hydrated Lime

Also known as slaked lime.
Hydrated Lime is used to improve the consistency of mortars.
Tayyaba Rehman
Oct 04, 2023

Quicklime

A product of limestone calcination.
The kiln produces Quicklime through the calcination of limestone.
Tayyaba Rehman
Oct 04, 2023

Hydrated Lime

Less reactive than quicklime.
Compared to Quicklime, Hydrated Lime is safer to handle.
Tayyaba Rehman
Oct 04, 2023

Quicklime

White, caustic alkaline substance.
When handling Quicklime, protective equipment is essential due to its caustic nature.
Tayyaba Rehman
Oct 04, 2023

Hydrated Lime

Used in construction and waste treatment.
Hydrated Lime helps in stabilizing roads by improving the soil's properties.
Tayyaba Rehman
Oct 04, 2023

Quicklime

Calcium oxide derived from limestone.
Factories use Quicklime in various industrial processes.
Tayyaba Rehman
Oct 04, 2023

Hydrated Lime

Calcium hydroxide produced from quicklime.
Hydrated Lime is essential in many water treatment processes.
Tayyaba Rehman
Oct 04, 2023

Quicklime

Highly reactive with water.
Quicklime releases heat when it interacts with water.
Tayyaba Rehman
Oct 04, 2023

Hydrated Lime

Result of controlled hydration of quicklime.
By adding water to Quicklime, factories produce Hydrated Lime.
Tayyaba Rehman
Oct 04, 2023

Quicklime

See calcium oxide.
Tayyaba Rehman
Oct 02, 2023

Quicklime

Calcium oxide, which is produced by heating (calcining) limestone and gives slaked lime on treatment with water.
Tayyaba Rehman
Oct 02, 2023

Quicklime

(transitive) To treat with quicklime.
Tayyaba Rehman
Oct 02, 2023

Quicklime

Calcium oxide; unslacked lime; - so called because when wet it develops great heat. See 4th Lime, 2.
Tayyaba Rehman
Oct 02, 2023

Quicklime

A white crystalline oxide used in the production of calcium hydroxide
Tayyaba Rehman
Oct 02, 2023

Common Curiosities

What's the chemical formula of Quicklime?

The chemical formula of Quicklime is CaO.
Tayyaba Rehman
Oct 31, 2023

Can Quicklime be safely touched with bare hands?

No, Quicklime is caustic and can cause burns when it reacts with moisture.
Tayyaba Rehman
Oct 31, 2023

What are the safety concerns associated with Hydrated Lime?

While less caustic than Quicklime, Hydrated Lime can cause skin or eye irritation.
Tayyaba Rehman
Oct 31, 2023

How does the reactivity of Hydrated Lime compare to Quicklime?

Hydrated Lime is less reactive than Quicklime.
Tayyaba Rehman
Oct 31, 2023

Which is more caustic, Quicklime or Hydrated Lime?

Quicklime is more caustic than Hydrated Lime.
Tayyaba Rehman
Oct 31, 2023

Is there a significant price difference between Quicklime and Hydrated Lime?

Prices can vary based on region, quality, and demand, but generally, Quicklime is cheaper due to simpler production.
Tayyaba Rehman
Oct 31, 2023

What is Quicklime commonly used for?

Quicklime is used in steel manufacturing, flue gas treatment, and some water treatment processes.
Tayyaba Rehman
Oct 31, 2023

Why is Hydrated Lime added to mortars?

Hydrated Lime improves the workability and reduced setting time of mortars.
Tayyaba Rehman
Oct 31, 2023

Can Hydrated Lime be used for soil stabilization?

Yes, Hydrated Lime is commonly used for soil stabilization in road construction.
Tayyaba Rehman
Oct 31, 2023

How is Hydrated Lime produced?

Hydrated Lime is produced by adding a controlled amount of water to Quicklime.
Tayyaba Rehman
Oct 31, 2023

How is Quicklime produced?

Quicklime is produced by heating limestone to high temperatures in a process called calcination.
Tayyaba Rehman
Oct 31, 2023

Why is the controlled addition of water essential when producing Hydrated Lime?

A controlled addition ensures the desired chemical composition and minimizes safety risks.
Tayyaba Rehman
Oct 31, 2023

Is the reaction between Quicklime and water endothermic or exothermic?

The reaction between Quicklime and water is exothermic.
Tayyaba Rehman
Oct 31, 2023

Do both Quicklime and Hydrated Lime find applications in water treatment?

Yes, both are used in different water treatment processes based on their properties.
Tayyaba Rehman
Oct 31, 2023

Are Quicklime and Hydrated Lime environmentally friendly?

Generally, both are considered environmentally benign, but their production can emit CO2, a greenhouse gas.
Tayyaba Rehman
Oct 31, 2023

Share Your Discovery

Share via Social Media
Embed This Content
Embed Code
Share Directly via Messenger
Link
Previous Comparison
Acetic Acid vs. Vinegar

Author Spotlight

Written by
Tayyaba Rehman
Tayyaba Rehman is a distinguished writer, currently serving as a primary contributor to askdifference.com. As a researcher in semantics and etymology, Tayyaba's passion for the complexity of languages and their distinctions has found a perfect home on the platform. Tayyaba delves into the intricacies of language, distinguishing between commonly confused words and phrases, thereby providing clarity for readers worldwide.
Co-written by
Fiza Rafique
Fiza Rafique is a skilled content writer at AskDifference.com, where she meticulously refines and enhances written pieces. Drawing from her vast editorial expertise, Fiza ensures clarity, accuracy, and precision in every article. Passionate about language, she continually seeks to elevate the quality of content for readers worldwide.

Popular Comparisons

Featured Comparisons

Trending Comparisons

New Comparisons

Trending Terms