INDEX • Colloidals and its introduction. Pg 3 • Colloidal dispersions. Pg 3 • Classification of colloids. Pg 4 (Lyophilic colloids pg 4) (Lyophobic colloids pg 5) • Purification of colloids. Pg 5 (Dialysis pg 6) (Electrodialysis pg 6) (ultrafiltration pg 6) • Properties of colloids. Pg 7 (Tyndall effect pg 7) (Brownian movement pg 7) • Applications of colloids. Pg 8 …show more content…
A colloid is a word which is comes from a Greek word Kolla, means, Glue thus colloidal particles are just glue like substance. The particles of colloid can be made by the process of centrifugation. A colloid which consist of two phases one is Dispersed phase and the other is Continuous phase. The size range of this mixture with a Dispersed phase is from 1nm to 100nm may be colloidal aerosols, colloidal emulsions colloidal hydrosols or dispersions. It is also known by the name of Colloidal Suspensions. COLLOIDAL DISPERSIONS >> In a colloidal solutions the particles of colloid does not completely dissolved in a solvent however it is not visible to human naked eyes. >> The particles of dispersed phase are affected in the colloid due to the surface chemistry present in it. >> The diameter of the particles of dispersed phase is from 1nm to 0.5nm . CLASSIFICATION OF COLLOIDS >> Colloids are classified on the basis of nature of interaction between Dispersed phase and Dispersion …show more content…
>> Lyophilic colloids can easily be prepared by directly mixing colloid with liquid as these are liquid loving colloids. >> Due to the strong forces of interaction between the particles of colloid and liquid their solutions are relatively stable. >> As because in lyophilic solutions Dispersion Phase and Dispersion Medium can be separated therefore it is reversible in nature. - Lyophobic colloids/ Hydrophobic colloids: As Lyo means solvent and Phobic means hating thus Lyophobic colloids are liquid hating colloids. >> As because these are water hating colloids so their solutions can’t be prepared by mixing colloid with liquid. >> Due to the presence of weak forces of interaction between particles of colloid and liquid therefore lyophobic colloids are less stable. >> As because Dispersion Phase and Dispersion Medium can’t be separated in Lyophobic colloids thus it is irreversible. PURIFICATION OF COLLOIDS: Some common methods for their purification are as under: a) Dialysis. b) Electrodialysis. c) Ultra filtration. Dialysis: The process of diffusion across the membrane causes removal of ions or molecules from colloidal
Colloidal silver is particles of silver broken down or mixed into liquid. In the early 20th, ,century colloidal silver or as it is more popularly known “silver water” was marketed as a cure for tumors; now in alternative medicine it is referenced as a cure all with healing properties.
In a phenomenon termed the “hydrophobic effect”, 4 surfactants act the way they do in
soluble. In other words, any way ap person gets it in his or her body, it will
...nstead of the common crystalline state, something that is extremely hard (gizmodo.com). That’s where the liquid levitation comes in, a machine that uses sound waves to make liquid solutions float. This way the liquid solutions don't touch any solid materials as the water evaporates, solidifying in the much desired amorphous drug, so it can be more efficient in helping.
According to osmosis theory as the concentration of the sucrose solution increases the particles water potential increases and becomes higher than the particles that are in the
...ture composed of two or more substances. Because the two substances are able to form a homogeneous mixture, they are said to be miscible. The substances are not chemically combined. The solute cannot be filtered out, and a solution will not display a tyndall effect. Also, the solute is generally the substance which there is less of. Aqueous solutions like NaOH or HCl are dissolved in water. In the 0.1 M solution of NaOH, the NaOH is the solute and water is the solvent. There are certain solubility rules that determine weather or not a substance is soluble. NaOH is soluble because of the rule stating that “salts containing group I elements are soluble,” and Na is in group I on the periodic table.
== Refer to, Chemistry Lab #1 – What’s the substance? I didn’t change most materials when I did this experiment, but I added 4 materials, which are: * 5 test tubes * 2 stoppers * 1 large piece of paper And I deleted 1 material, which is: * Spatula Methods = == ==
Slime is a special play material made up of tangled polymer. It is mostly made by mixing polyvinyl with the chemical compound known as borate ions, you can describe it as a liquid and mix it in a sizable container for mixing. In a more difficult explanation, slime is more commonly known amongst scientists as a Non-Newtonian fluid. These are thick liquids that have a numerous selection of viscosity.
The ingredients used in making slime contain fundamental additives that, when mixed together, cause the thick, gooey, slime every kid enjoys. Polymers are made from several smaller molecules joined by chemical bonds. The polyvinyl allows the mixture to feel slimy. Combing the polyvinyl and Borax together creates a chemical reaction. The mixture becomes cold, thicker, and elastic. This combination mixed together produces slime that is fun and safe for all ages.
In the spray drying process, dry and liquid ingredients are first combined into a slurry, or thick suspension, in a tank called a crutcher.
The purpose of this lab was to see firsthand the diffusion of a substance across a selectively permeable membrane. Diffusion is the movement of molecules from an area of high concentration to an area of lower concentration until both concentrations are equal, or as you could more professionally call it, equilibrium. This concept is one that we have been studying in depth currently in Biology class.
Solubility is when a chemical substance that is a gas, solid, or liquid that is called solute dissolves in a solvent that is also a gas, solid, or liquid to form a solution. To determine the solubility of a substance it depends on the physical and chemicals properties of both the solute and the solvent as well as pressure, temperature, and the pH of the solution. ( Solubility, Wikipedia 2016)
Cohesive Force: The intermolecular forces that cause liquids to resist separation and to remain a certain shape. This exists between molecules of the same substance.
Solids have a definite shape and do not take the shape of their container. Liquids do not have any definite shape and do take the shape of their container, the same is true with gases. Once again it is the bond between the atoms of liquids, and gases that make it have no definite shape. The first phase of matter is solids. Solids are the most stable form of matter.
were created because they could be kept in liquid form and in an only slightly