Chemical salts I. Solubility

07/05/2026

The online chemical salt solubility simulations on this page allow you to interactively visualize the dissolution process of a salt. In addition, the molecules of Sodium Chloride, Copper Iodide and Thallium Sulfide are also shown.

This Thematic Unit is part of our Chemistry collection

Anion

Ion with a negative electrical charge formed when a neutral atom gains one or more electrons.

Cation

Ion with a positive electrical charge formed when a neutral atom loses one or more electrons.

Crystal Lattice

Highly ordered three-dimensional structure in which the ions of a salt are organized in a solid state.

Electrolyte

Substance that, when dissolved in water, dissociates into ions and allows the conduction of electric current.

Salt

Chemical compound formed by cations and anions through an ionic bond, typical result of the reaction between an acid and a base.

Solvation

Process by which solvent molecules surround and attract salt ions, facilitating their dissolution.

What are chemical salts?

Chemical salts are ionic compounds formed from the combination of a cation with an anion.

Solubility of chemical salts

The solubility of a salt depends on its chemical structure and the environmental conditions in which it is found, such as temperature and pressure. The solubility of salts is of great importance in many chemical processes and in industry.

The solubility of a salt can be determined by a number of experiments. In general, the solubility of salts increases with temperature. As the temperature increases, the solvent molecules move faster, allowing for greater interaction with the salt ions and greater dissolution. However, there are some exceptions where solubility decreases with temperature.

Factors affecting the solubility of the chemical salts

In addition to temperature, the pH of the medium can also affect the solubility of a salt. Some salts are more soluble in acidic media, while others are more soluble in basic media. This is because the pH of the medium can influence the charge of the salt ions, which in turn affects their ability to interact with the solvent.

Importance of chemical salts solubility

The solubility of salts is also of great importance in industry. For example, in the manufacture of pharmaceuticals, it is important that the active ingredients dissolve easily in the body so that they can be effective. In food production, the solubility of salts can affect the texture and appearance of the final products.

In short, these online chemical salt simulations will help you to better understand what these important chemical compounds are and how they work.

Anion

Ion with a negative electrical charge formed when a neutral atom gains one or more electrons.

Cation

Ion with a positive electrical charge formed when a neutral atom loses one or more electrons.

Crystal Lattice

Highly ordered three-dimensional structure in which the ions of a salt are organized in a solid state.

Electrolyte

Substance that, when dissolved in water, dissociates into ions and allows the conduction of electric current.

Salt

Chemical compound formed by cations and anions through an ionic bond, typical result of the reaction between an acid and a base.

Solvation

Process by which solvent molecules surround and attract salt ions, facilitating their dissolution.

Explore the exciting STEM world with our free, online, simulations and accompanying companion courses! With them you’ll be able to experience and learn hands-on. Take this opportunity to immerse yourself in virtual experiences while advancing your education – awaken your scientific curiosity and discover all that the STEM world has to offer!

Simulations and 3d molecules of chemical salts

Salts and solubility

Add different salts to water, and then watch them dissolve and achieve dynamic equilibrium with the solid precipitate. Compare the number of ions in the highly soluble NaCl solution with other poorly soluble salts. Relate the charges on the ions to the number of ions in the formula of a salt. Calculate the Ksp values.

Sodium Chloride

Sodium chloride, common salt or table salt, referred to in its mineral form as halite, is a chemical compound with the formula NaCl. Sodium chloride is one of the salts responsible for the salinity of the ocean and the extracellular fluid of many organisms. It is also the component of common salt, used as a seasoning and food preservative.

Sodium Chloride

NaCl

Single bond

Double bond

Triple bond

Wedge bond

Hash bond

Copper(I) Iodide

Copper(I) iodide is the inorganic compound with the formula CuI. It is also known as cuprous iodide. It is useful in a variety of applications ranging from organic synthesis to cloud seeding.

Copper(I) Iodide

CuI

Single bond

Double bond

Triple bond

Wedge bond

Hash bond

Thallium(I) sulfide

Thallium(I) sulfide, Tl2S, is a chemical compound of thallium and sulfur. It was used in some of the earliest photoelectric detectors, used in early film projectors.

Thallium(I) sulfide

Tl₂S

Single bond

Double bond

Triple bond

Wedge bond

Hash bond

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“If I have seen further, it is by standing on the shoulders of giants”

Isaac Newton

Fritz Haber

1868

–

1934

Fritz Haber developed the Haber-Bosch process, enabling large-scale ammonia synthesis, revolutionizing fertilizer production and industrial chemistry

“Chemistry has the power to transform life on Earth”

Robert Boyle

1627

–

1691

Robert Boyle formulated the first quantitative law of gases, showing the relationship between pressure and volume, laying foundations of modern chemistry and fluid mechanics

“Air is as necessary to life as food”

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“If I have seen further, it is by standing on the shoulders of giants”

Isaac Newton

Robert Boyle

1627

–

1691

Robert Boyle formulated the first quantitative law of gases, showing the relationship between pressure and volume, laying foundations of modern chemistry and fluid mechanics

“Air is as necessary to life as food”

Antoine-Laurent de Lavoisier

1743

–

1794

Antoine Lavoisier estableció la ley de conservación de la masa y nombró el oxígeno e hidrógeno, sentando las bases de la química moderna

“La nada no produce nada”

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What are chemical salts and how are they formed?

Chemical salts are ionic compounds formed by a cation (positively charged ion) and an anion (negatively charged ion), which attract each other electrostatically to create an ordered structure. Many salts result from a neutralization reaction between an acid and a base, where ions exchange charges until they stabilize as a solid ionic compound. This type of structure and bonding gives salts characteristic properties such as high melting points and electrical conductivity when dissolved in water.

What factors affect the solubility of a salt in water and why?

The solubility of a salt in water depends on several factors, mainly temperature and pH. Generally, solubility increases with temperature because water molecules move faster and can surround and interact more effectively with the salt’s ions, facilitating dissolution. However, there are exceptions where solubility decreases as temperature rises. The pH also influences solubility by changing the effective charge of the ions, and certain salts are more soluble in acidic or basic conditions depending on how their ions interact with H⁺ or OH⁻ in the solution. These factors determine how much salt can dissolve before equilibrium between solid and solution is reached.

Why do some salts, like sodium chloride, dissolve easily in water while others hardly do?

It makes sense that some salts dissolve more easily than others because their ionic structure and the strength of attraction between their ions are not always the same. In salts like sodium chloride, the interaction between the ions and water molecules is very strong, allowing them to separate and disperse quickly. In other salts with stronger ionic bonds or larger ions, it can be harder to “break” the crystal lattice, which reduces solubility.

Does it make sense that heating a solution allows more salt to dissolve even though the amount of water is the same?

Yes, because when the solution is heated, the water molecules have more kinetic energy and move faster, which makes it easier to “break” the ionic interactions in the salt and surround the ions. This increased interaction between water and ions allows more particles of salt to dissolve before solubility equilibrium is reached, so the solution can hold more solute.

How does the pH of the solution affect the solubility of a salt?

The pH of the solution can influence solubility because it affects the charge of the ions present in the water. Some salts are more soluble in acidic conditions because H⁺ ions interact with certain ions of the solute, helping them to release into solution. Other salts are more soluble in basic conditions due to a similar effect with OH⁻ ions. This pH effect can increase or decrease solubility depending on the nature of the salt’s ions and their affinity for the solvent.