Question

write three differences between
* homogeneous mixture and
heterogeneous mixture
* suspension and colloid
* solution and colloid

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Answer 1

Answer:

Homogenous and Heterogeneous mixture :

1. A homogeneous mixture is a solid, liquid or gaseous mixture that has the same proportions of its components throughout any given sample. Conversely, a heterogeneous mixture has components in which proportions vary throughout the sample.
2. In homogeneous mixture The whole mixture is in same phase. But in heterogeneous mixture Substances can be of two phases and layers may separate.
3. In homogeneous mixture components can easily be separated. Eg.: Sugar + Water → Sugar solution . But in heterogeneous mixture Components can be separated easily. Eg.: Salt + Sand

Suspension and Colloid:

1. Suspension is defined as a heterogeneous mixture of two substances in which one is dispersed into the other, suspensions involve particles larger than those found in solutions, typically over 1,000 nm. whereas colloids are heterogeneous mixture of two substances like suspensions, colloids involve particles from 1-1,000 nm.
2. The bigger particles of a suspension usually settle or separate out of a mixture upon standing or are able to be filtered out, although not through filter paper.The particles in a colloid land in size between those in a solution and a suspension and may be solid, liquid or gas.
3. Particles in a suspension can be seen by the naked eye, but those in a colloid must be viewed using a light microscope.

Solution and Colloid :

1. The solution is the homogenous mixture, while Colloids are the heterogeneous mixtures of two or more substances.
2. True solution is transparent whereas colloid is translucent.
3. Ture solutions does not show tyndall effect whereas tyndall effect is shown by colloidal solution.

Answer 2

Answer:

1 Homogeneous mixture :(a) uniform composition.

(b) eg- sugar in water, salt in water, sulphur in carbon disulphide, water, air etc...

Heterogeneous mixture :(a) non-uniform compositions.

(b) eg- sand and salt, sugar and salt, wood, water in oil etc...

2 Suspension :(a) Non-homogenous systems in which solids are dispersed in liquids are called suspension.

(b) A suspension is a heterogeneous mixture in which the solute particles do not dissolve but remain suspended throughout the bulk of the medium.

(c) Particles are visible to the naked eyes.

Colloid :(a) A colloid or a colloidal solution is a mixture where the particles are uniformly spread throughout the solution.

(b) Due to the relatively smaller size of particles as compared to that of a suspension the mixture appears to be homogenous. But actually a colloidal solution is a heterogeneous mixture. for eg- milk.

(c) Particles are not visible to the naked eyes.

Solution :(a) A solution is a homogeneous mixture of two or more substances.

(b) A solution has a solvent and a solute as its components.

(c) eg- Lemonade, soda water etc...

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