Difference between Liquid and Aqueous

In physics, the liquid is a condition of matter without a defined shape but with a known volume. Liquid has no set shape. Small particles such as atoms, molecules, and compounds make up liquid, and chemical bonds hold them together.

Molecules that can move freely inside a substance, but are loosely bonded by intra-molecular forces make up one of the four major states of matter. The shape of a liquid might change depending on the container it is in. This is because liquids don’t have a set shape like solids. Because pressure is transferred from one point to another, unlike a gas, the volume of a liquid normally remains constant. Only slightly changes under pressure.

A water-based system is referred to as aqueous. A solution or mixture in which water serves as the solvent is referred to as aqueous. We write (aq.) after the chemical name to state that it has been dissolved in water.

Introduction to Liquid

The other three forms of matter are solid, gas, and plasma with liquid being the fourth. Everything that can be described as a liquid also applies to solids. Molecules in a liquid are significantly more liberated than those in a solid. Liquid molecules do not have to be permanently bound together like solid ones. This allows liquid to flow while solids remain stiff.

When it comes to fluid qualities, a liquid is no different than a gas. Even though liquids flow, they can take on the shape of containers. They distribute applied pressure evenly across the entire container if placed in a sealed container. If you put liquid in a bag, you can squeeze it into any form you want. This means that it has about the same volume at all pressures. Liquids do not expand to fill container space like gases do, but instead create their own surface. Liquids also do not always mix well with one another. In hydraulics, a liquid with these characteristics is ideal.

Introduction to Aqueous

Water dissolves a chemical to form an aqueous solution. Aqueous solutions are used in labs and industry. Water, which is the solvent in this situation since it is present in a bigger quantity, is mixed with the chemical known as the solute. Water is the only solvent in all aqueous solutions, hence they are all liquids. Water and ordinary table salt are combined to generate a solution known as NaCl (aq.). By including (aq.) after the name, the substance is identified as aqueous. There are two types of substances: 

  • Hydrophobic
  • Hydrophilic

It’s important to know the difference between hydrophobic and hydrophilic substances since hydrophobic substances are afraid of water and hydrophilic substances are attracted to it. Aqueous solutions are what acids and bases are, according to their definitions. Dissolvability is governed by the strength of an object’s attractive forces compared to those generated by water molecules. The precipitate is formed when a material does not dissolve in water. While mostly precipitates are visible to the naked eye, you can observe them under a digital microscope for detailed imaging. Electricity can be conducted and efficiently conducted in aqueous solutions with strong electrolytes. Solutions with weak electrolytes have low electrical conductivity. Water completely ionizes good conductors, but poor conductors only display a modest degree of ionization. Poor conductors: Bleach, blood, paint, and milk are all examples of aqueous solutions.

General Properties of Liquid

There are the following properties of liquids.

Capillary Action

Capillary action can be defined as the ascent of liquids through a thin tube, cylinder, or porous substance due to the interaction of adhesive and cohesive forces between the liquid and the surface. A liquid has capillary action when the intermolecular interaction between its molecules is weaker than the surface of the substance with which it is interacting. The volume of liquid elevated will also be determined by the container’s diameter and gravitational forces.

Cohesive and adhesive forces

This phrase does not apply to discussions of atomic and molecular qualities because cohesive and adhesive forces are linked to bulk (or macroscopic) properties. Whenever a liquid is brought into contact with a surface, it is subjected to the forces of cohesion and adhesion. These forces are in charge of determining the final shape of the liquid.

Contact angle

To determine a surface’s wet-ability, scientists often use the contact angle. With regards to wetting, we’re talking about the investigation of the spread of liquids on solid (or liquid) surfaces, or the capacity of liquids to establish boundary surfaces with solid states. A liquid’s contact angle with solids or liquids, as previously said, determines how well it’s wetted. There is a more wetting tendency when the contact angle or surface tension is smaller.

Surface tension

The energy or work required to raise the surface area of a liquid due to intermolecular forces is known as surface tension. Because the composition of the liquid (e.g., water vs. gasoline) and the solutes in the liquid (e.g., surfactants like detergent) influence these intermolecular pressures, each solution has different surface tension features.

Unique Properties of Liquid

Since the oceans cover 70% of our planet’s land area and our bodies contain 60% water, we can hardly ignore the significance of water in our existence. Depending on how it is processed, water can take on three various forms ice, liquid, and gas (steam). For this reason, many individuals are ignorant of the fascinating features of water, which include the following:

Vapor pressure

Pressure is a measure of how much stuff (gas, liquid, or solid) is exerted on a surface, such as the walls of a container. Vapor pressure is also known as equilibrium vapor pressure and refers to the pressure at which vapor and its condensed phases are in thermodynamic equilibrium in a closed container. No matter what shape they start off in, all substances eventually evaporate or sublime into some other substance and all gases eventually condense back into their original liquid or solid state.


Bulk property viscosity can be described as the resistance of a liquid to flow. A liquid has a greater viscosity when the intermolecular forces of attraction are strong. As an illustration of this phenomenon, visualize two liquids competing for space on a windshield. So if you had to choose between honey and water, which would you expect to roll down the windshield faster?”  It is common knowledge that water would simply pass right through honey however; honey has a far higher viscosity than water, as evidenced by the experiment.

Wetting Substance

Because it helps liquids spread more readily, something is a wetting agent when it lowers the liquid’s surface tension.

Properties of Aqueous

Aqueous fluids frequently permit the conductivity of electricity. Electrolyte-rich solutions such as seawater are excellent electrical conductors. 

On the other hand, weak electrolyte solutions like tap water are poor conductors. As a result, strong electrolytes in water totally break down into ions, whereas weak electrolytes partially dissociate.

Double replacement reactions are common when chemical reactions take place in an aqueous solution involving different species.

Whenever this happens in reactions, the substituent cation from one reactant takes the place of the other reactants. As a result, an ionic connection is often formed.

Water-soluble products or precipitates can be produced by chemical reactions taking place in an aqueous solution. A precipitate is a poorly soluble chemical that frequently solidifies upon removal from the solution.

Aqueous solutions have the chemical make-up of acids and bases.

Difference between Liquid and Aqueous

While all aqueous solutions are also liquids, this is not always the case. Any fluid that is close to being incompressible is considered liquid however aqueous liquids have water as their solvent. This is a prominent difference in them. As a result, aqueous solutions are considered to be liquids themselves. Also, another crucial distinction between water-based solutions and those that are aqueous is that pure liquids have no solvent, while impure liquids have either an organic or inorganic-based solvent.

It is also worth noting that whereas aqueous solutions are usually made up of water-soluble solutes, liquid solutions may comprise either water-loving or water-hating compounds.

Comparison Chart

           Liquid              Aqueous
State of matter Any kind of incompressible fluidWater containing solution  
All types of liquid are not aqueous Liquid may be hydrophobic or hydrophilicAqueous solutions are always liquid Aqueous are always hydrophilic
Liquids may be polar or non-polarAqueous is always polar 
Pure liquid has no solvent Impure liquids have solvent (that may be organic or inorganic)Always contain water as solvent 


In the chemical world, an aqueous solution is a liquid. As a result, all aqueous solutions are also liquids however this is not always the case. Liquids are fluids that are almost incompressible while aqueous are liquids that have water as a solvent as their primary difference.

Despite the fact that liquid and aqueous are diametrically opposed and cannot be used interchangeably. Fluids that are close incompressible are described as liquids, while liquids with water as the solvent are described as aqueous.

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