Table of Contents
- 1 When can we say that a colloid is hydrophilic or hydrophobic?
- 2 What is a mixture in which some of the particles will settle out?
- 3 How do hydrophobic particles disperse in water?
- 4 What are hydrophobic colloids?
- 5 Which mixture has big particles that tend to settle at the bottom of the container?
- 6 When liquid is dispersed in liquid it is called?
- 7 Which particle is scattered into the state 1?
- 8 What happens when two or more particles are bound tightly together?
When can we say that a colloid is hydrophilic or hydrophobic?
hydrophilic: Having the tendency to mix with water. hydrophobic: Having the tendency to not mix with water. colloid: A stable system of two phases, one of which is dispersed in the other in the form of very small droplets or particles.
What gives stability to hydrophobic colloids in water?
Hydrophobic colloids can be stabilized by adsorption of ions on their surface, as shown in Figure 13.29. (Adsorption refers to adherence to a surface. For example, small droplets of oil are hydrophobic. They do not remain suspended in water; instead, they separate, forming an oil slick on the surface of the water.
What is a mixture in which some of the particles will settle out?
A suspension is a heterogeneous mixture in which some of the particles settle out of the mixture upon standing. The particles in a suspension are far larger than those of a solution, so gravity is able to pull them down out of the dispersion medium (water).
What type of colloid is formed when solid is dispersed in liquid?
sol
Solid in liquid. The colloidal type is a sol.
How do hydrophobic particles disperse in water?
Fortunately, there is a simple way to overcome the hydrophobic effect. It is called a surfactant, a detergent, or simply “soap.” Surfactant is a magical molecule that has both hydrophobic and hydrophilic properties, which coats the particles and helps them mix into water.
Do hydrophobic colloids contain water?
Hydrophilic colloids contain an outer shell of groups that interact favorably with water, whereas hydrophobic colloids have an outer surface with little affinity for water.
What are hydrophobic colloids?
A hydrophobic colloid, or emulsion, is defined as a colloid system where the colloid particles are hydrophobic polymers. Hydrophobic colloids do not interact with water, so they are inherently unstable and generally do not form spontaneously.
What kind of mixture is formed when larger particles settle out?
suspension
A suspension is a heterogeneous mixture in which some of the particles settle out of the mixture upon standing. The particles in a suspension are far larger than those of a solution and thus gravity is able to pull them down out of the dispersion medium (water).
Which mixture has big particles that tend to settle at the bottom of the container?
Suspensions are mixtures where the particles settle to the bottom of the container. This means that the particles in a suspension are large enough that gravity pulls them out of solution.
What is solid dispersed in liquid called?
Sol is a colloidal suspension with solid particles as dispersed phase dissolve in a liquid i.e dispersion medium. Gel are a dispersion of molecules of a liquid within a solid in which liquid particles are dispersed in the solid medium. An emulsion is a mixture of two or more liquids that are normally immiscible.
When liquid is dispersed in liquid it is called?
Gel is a system in which liquid is the dispersed phase and solid is the dispersion medium. Medium.
How are hydrophobic particles dispersed?
Which particle is scattered into the state 1?
The particle a is scattered into the state 1. By a state we mean a given direction and energy, or some other given condition. The particle b is scattered into the state 2. We want to assume that the two states 1 and 2 are nearly the same.
What makes a particle distinguishable in quantum mechanics?
In quantum mechanics, particles can be identical and indistinguishable, e.g. electrons in an atom or a metal. The intrinsic uncertainty in position and momentum therefore demands separate consideration of distinguishable and indistinguishable quantum particles.
What happens when two or more particles are bound tightly together?
In (a) the two particles retain their identity; in (b) a neutron is exchanged during the collision. Now an interesting problem arises when there are two or more particles bound tightly together. For example, an α -particle has four particles in it—two neutrons and two protons.
What happens if A and B are identical particles?
In the scattering of two identical particles, the processes (a) and (b) are indistinguishable. Now let’s see what happens if a and b are identical particles. Then the two different processes shown in the two diagrams of Fig. 4–1 cannot be distinguished.