In contrast, a heterogeneous mixture contains at least two components that are not uniformly or evenly dispersed throughout the mixture and are identifiable as being different. For example, if salt and pepper are mixed together, the different salt granules and pepper flakes can be identified.
The proportion of salt versus pepper may be different as well. Heterogeneous mixtures are not solutions. Saltwater is a solution that breaks down salt into smaller pieces due to being mixed with water.
When dissolved, the particles are so small that they cannot be seen. Saltwater, due to an intermolecular attraction, is more likely to dissolve within one another and is termed as miscible because the substances mix equally in all proportions.
If you would like to see the chemistry of solution formation on a microscopic level, view this short video, which is less than one minute long. The narrator describes how water is attracted to the positive and negative ions of salt and how dissolution occurs, and the solution is formed. The rate of dissolution of salt into water is affected by the collision that occurs between the solvent and the solute. It is influenced by stir speed, temperature, and the size of the salt particles.
To speed up the process, stir more rigorously, heat the mixture, and use smaller salt particles. Interestingly, heating up the mixture also affects the amount of salt that is dissolved as well as how quickly. The solution can be separated into its two compounds by mechanically capturing water condensation and salt residue in a distillation process.
Other physical methods of separation may include filtration, crystallization, or evaporation. Sea salt is known to be obtained by the evaporation of seawater via heat from the sun. The seawater is collected into a pond and processed through an evaporation technique that removes the liquid leaving only the sea salt for harvesting. In this seven-minute video, a high school science instructor demonstrates the physical change of solubility.
A solution is within the physical chemistry field by definition because it pertains to the study of chemical systems. The formation of a solution, or the solution process, is a physical change, not a chemical transformation. Specifically, the saltwater chemical elements combine to make compounds, and the compounds combine to create a homogeneous mixture or solution. Many people buy or make their own distilled water.
In areas where the water is contaminated with harmful substances, due to the natural environment or a natural disaster, drinking distilled water can keep people healthy.
If people do not like the taste of the water in an area due to the dissolved minerals that give it a distinctive taste, they may prefer the more neutral taste of distilled water. Distilled water can be good for people, but they can have too much of a good thing.
It is possible to overhydrate , or have too much water in your body. Although human bodies are mostly water, it is important to maintain the correct balance of water and other substances. When athletes sweat, they lose both water and salt SF Fig. If an athlete drinks too much distilled or tap water after sweating heavily, they may throw off the balance of water and salts in their body. This affects the ability of their bodies to function properly.
In rare cases, if an athlete has consumed too much distilled or tap water, the water and salt imbalance is too great and the athlete can die. This is the reason why serious athletes drink sports drinks that have a balance of water, salts, and sugars to keep them properly hydrated SF Fig.
Most people can get the proper balance of water and salts through a normal diet and do not need to drink sports drinks.
This document may be freely reproduced and distributed for non-profit educational purposes. Skip to main content. Short Note. Explain why, a solution of salt in water is considered a mixture and not a compound. Solution Show Solution Solution of salt in water is a mixture and not compound because salt solution is made up of salt and water, mixed physically.
The constituents of salt solution might be present in varying ratios. Salt solution does not have fixed properties. Its properties depend on the nature of its components and the ratios in which they are mixed. The constituents of salt solution can be separated easily by physical methods, i.
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