How are colloids and suspensions different?
In colloids, particles are smaller than the particles in a suspension so they become influenced by the thermal collisions inside the liquid but not big enough to be dominated by gravity and settle at the bottom so they remain dispersed such as milk. In Suspensions, particles are dispersed in the liquid at the beginning but they are big enough to be pulled by gravity and settle after a while such as muddy water. So we can say briefly that colloid particles are dispersed permanently and suspension particles are dispersed temporarily. One other important difference is that collided disperse light
What is a colloid system?
Unlike a solution, whose solute and solvent constitute only one phase, a colloid system has a dispersed phase (the suspended particles) and a continuous phase (the medium of suspension). The word colloid usually refers to the suspended substance and not to the mixture as a whole.
Why do colloids not settle down?
Colloids do not settle down because they are stabilised by either charge or other colloids such as the stabilisation of a gold sol by adding agger jelly.
What are colloids similar to?
They are actually classified as Dispersions. Colloids are similar to Suspensions but much more stable.
What type of particle can be separated by filtration?
Colloid : Particles visible with a microscope, can be separated by filtration and scatters light.
What are the particles in water?
Also in the water are the unsoluble grounds (larger particles) and sediment (finer particles). These are in suspension.
What is pure substance?
Pure substance : Any substance which contains atoms or molecules of only that substance and nothing else.
What happens if you leave a suspension to rest?
a) If left to rest, the particles of a suspension will settle out.
Why is water a good solvent?
b) Water is such a good solvent because it repels most molecules
What is the Difference Between Suspension and Colloid?
The key difference between suspension and colloid is that the particles in a suspension are larger than the particles in a colloid. Another major difference between suspension and colloid is that suspension is a heterogeneous mixture whereas colloid can exist as either a homogeneous or heterogeneous mixture. When considering the settling down of the particles in each mixture, particles in a suspension can settle down under the influence of gravity, if we do not disturb the settling process. But, the particles in a colloid do not settle down under normal conditions. Hence, this is also a difference between suspension and colloid.
What is Suspension?
Suspension is a heterogeneous mixture of substances ( E.g., muddy water, flo ur dissolved in water). There are two components in a suspension, the dispersed material and the dispersion medium. There are larger solid particles (dispersed material) that distribute in a dispersion medium. The medium can occur as a liquid, gas or a solid. However, the dispersed material is usually solid.
What is a colloidal solution?
Colloidal solutions are translucent or opaque. Sometimes, particles in a colloid separate out by centrifugation or coagulation. For example, the proteins in milk coagulate when we supply heat or if we add an acid.
Why are suspensions opaque?
Because of the larger particles, the suspensions tend to be opaque and not transparent, because they do not transmit light.
What are the two types of mixtures?
There are mainly two types of mixtures, homogeneous mixtures and heterogeneous mixtures. In a homogeneous mixture, the composition is uniform, but in heterogeneous mixtures, it is not uniform.
What is the dispersing medium of a colloid?
We name the particles in a colloid as dispersed material, and the dispersing medium is analogous to the solvent in a solution. According to the dispersed material and the medium, there are different types of colloids. For instance, if the dispersed material is a gas in a liquid medium, the resulted colloid is ‘foam’ (e.g., whipped cream).
What is a mixture?
A mixture is an association of several substances. Suspensions, solutions, and colloids are two examples of such mixtures. Since the components in a mixture do not chemically bind together, we can physically separate them by filtration, precipitation, evaporation, etc. There are mainly two types of mixtures, homogeneous mixtures ...
