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Molten vs. Aqueous: What's the Difference?

Edited by Aimie Carlson || By Harlon Moss || Published on December 24, 2023
Molten refers to a substance in a liquid state due to heat, while aqueous describes a solution where water is the solvent.

Key Differences

Molten substances are typically solids at room temperature but become liquid upon heating, like molten lava. Aqueous solutions, however, involve substances dissolved in water, such as salt in seawater.
The term 'molten' is often associated with metals and volcanic lava, indicating extreme temperatures. Aqueous, in contrast, implies a solution at a range of temperatures where water remains liquid.
Molten materials can be very hot and are not always safe to touch. In contrast, aqueous solutions are often safe to handle, like tap water or saline solution.
The properties of molten substances, like viscosity, are influenced by temperature. For aqueous solutions, properties like pH and conductivity are important.
Molten substances are used in industrial processes like metal casting. Aqueous solutions are ubiquitous in biological systems and chemical reactions.

Comparison Chart

State of Matter

Liquid due to heat
Liquid solution with water as solvent


Typically very high
Varies, usually room temperature

Common Examples

Molten lava, molten metal
Saltwater, sugar solution

Industrial Use

Metalworking, glassmaking
Chemical solutions, pharmaceuticals


Often hazardous due to high temperatures
Generally safe, depending on solute

Molten and Aqueous Definitions


Made liquid by heating to high temperatures.
The volcano spewed molten rock.


Made from, with, or by water.
The aqueous humor is a clear fluid in the eye.


Turned into liquid by heat.
The blacksmith worked with molten iron.


Pertaining to a solution where water is the solvent.
The scientist prepared an aqueous mixture.


Describing a heated, liquid state of a material.
The molten glass was shaped into a vase.


Relating to or resembling water, especially as a solvent.
The medication was administered in an aqueous form.


Pertaining to substances melted by heat.
The foundry poured molten steel into molds.


Containing water or similar to water.
The aqueous solution was used in the experiment.


Relating to the liquid phase of a material heated beyond its melting point.
The artist created a sculpture from molten bronze.


Involving or using water.
The plant's roots absorbed the aqueous nutrients.


Made liquid by heat; melted
Molten lead.


Relating to, similar to, containing, or dissolved in water; watery.


(Geology) Formed from matter deposited by water, as certain sedimentary rocks.


(chemistry) Consisting mostly of water.


Partaking of the nature of water, or abounding with it; watery.
The aqueous vapor of the air.


Made from, or by means of, water.
An aqueous deposit.


Similar to or containing or dissolved in water;
Aqueous solutions


What does 'molten' mean?

It refers to a substance in liquid form due to heat.

Can molten substances be at room temperature?

No, they are typically hot and become solid at room temperature.

Is molten lava the same as magma?

No, magma is molten rock beneath the Earth's surface, lava is above it.

Are all metals molten at the same temperature?

No, different metals have different melting points.

Can aqueous solutions exist in different temperatures?

Yes, as long as water remains liquid.

Are all aqueous solutions safe to drink?

No, safety depends on the dissolved substances.

Can molten materials be different colors?

Yes, depending on the material and temperature.

Can molten substances be cooled into solids?

Yes, when cooled, they solidify.

What does 'aqueous' mean?

It describes a solution where water is the solvent.

Are all aqueous solutions liquid?

Yes, they are liquid solutions.

Is seawater an aqueous solution?

Yes, it's water with dissolved salts.

Are both molten and aqueous states reversible?

Yes, through temperature changes and evaporation or freezing.

Are aqueous solutions used in medicine?

Yes, in various forms like intravenous solutions.

Are tears an example of an aqueous solution?

Yes, as they are water-based.

Can aqueous solutions freeze?

Yes, if the temperature drops below the freezing point of water.

Why is molten metal dangerous?

Due to its high temperature and potential for causing burns.

What is an example of a molten material in daily life?

Molten candle wax.

Is molten glass used in art?

Yes, in glassblowing and sculpting.

Can aqueous solutions conduct electricity?

Some can, depending on the solutes.

How are molten substances handled safely?

With protective gear and proper training.
About Author
Written by
Harlon Moss
Harlon is a seasoned quality moderator and accomplished content writer for Difference Wiki. An alumnus of the prestigious University of California, he earned his degree in Computer Science. Leveraging his academic background, Harlon brings a meticulous and informed perspective to his work, ensuring content accuracy and excellence.
Edited by
Aimie Carlson
Aimie Carlson, holding a master's degree in English literature, is a fervent English language enthusiast. She lends her writing talents to Difference Wiki, a prominent website that specializes in comparisons, offering readers insightful analyses that both captivate and inform.

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