8. Solutions

Question 1

Solution

Answer 1

A solution is a homogeneous mixture of a solute and a solvent where the path of the light is not visible and it cannot be separated by filtration.

Question 2

Non-newtonian Fluid

Answer 2

A non-Newtonian fluid is a fluid where the viscosity can can change when under force to be either more liquid or more solid. Does not have constant viscosity.

Question 3

Saturated solution

Answer 3

A solution in which the maximum amount of solute has been dissolved in a solvent. Any more solute added will sit as crystals on the bottom of the container creating a supersaturated solution, that contains more than the maximum amount of solute that is capable of being dissolved at a given temperature.

Question 4

Suspension

Answer 4

• A suspension is a mixture of two or more components.Small solid particles are mixed in a liquid but do not dissolve. If left to sit, particles will separate from the liquid and either fall to the bottom or rise to the top.
• Can be separated by filtration
• May scatter light or be opaque

Question 5

Colloid

Answer 5

• A colloid is a mixture is two or more substances mixed together but not chemically combined ( they can be separated ). They are a special type of mixture where tiny particles of one substance are scattered through another substance. Cream is a colloid as it’s made up of tiny particles of fat dispersed in water.
• Cannot be separated by filtration
• Scatter light

Question 6

Types of Mixtures

Answer 6

Question 7

Compare a solution, collid, suspension

Answer 7

The key difference between suspension and colloid is that the particles in a suspension are larger than the particles in a colloid.

Question 8

Separating solutions, colloids and suspensions.

Answer 8

a true solution can be seperated using Distillation. colloid is a heterogeneous mixture and its components can be separated by centrifugation. The solute particles settle when a suspension is left undisturbed if the suspension is unstable. Sediment can be separated from the mixture by the process of filtration.

Question 9

Diffusion

Answer 9

The movement of molecules from a region of higher concentration to a region of lower concentration down the concentration gradient.

Question 10

Emulsion

Answer 10

An emulsion is a mixture of two or more liquids that are usually immiscible but under specific transforming processes will adopt a macroscopic homogeneous aspect and a microscopic heterogeneous one. In an emulsion, one liquid is dispersed in the other.

Question 11

Solution v Colloid

Answer 11

A colloid is a mixture containing dispersed or suspended particles in the dispersion medium. In contrast, a solution is a mixture containing one or more solutes in the solvent.