What is meant by a substance?
A substance which consists of a single type of particle and it cannot be separated into other kinds of matter by any physical process is called a substance.
List the points of differences between homogeneous and heterogeneous mixtures.
|
Homogeneous mixture |
Heterogeneous mixture |
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It is the mixture in which different constituents are mixed uniformly. |
It is the mixture in which different constitutes are not mixed uniformly |
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They cannot have physically distinct parts. |
They have physically distinct parts. |
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The constituents cannot be easily seen. |
The constituents can be easily seen. |
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The constituents cannot be easily separated. |
The constituents can be easily separated. |
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Example: sugar solution, soda water, soft drinks, vinegar, air etc. |
Example: sugar and sand mixture, milk, ink, paint, etc. |
To make a saturated solution, 36 g of sodium chloride is dissolved in 100 g of water at 293 K. Find its concentration at this temperature.
Mass of sodium chloride = 36g
Mass of solution =100g
Mass of the solution = 100+36g =136g
Concentration of the solution = 36/136 x 100 =26.47%
To make a saturated solution, 36 g of sodium chloride is dissolved in 100 g of water at 293 K. Find its concentration at this temperature.
Mass of sodium chloride = 36 g
Mass of water = 100 g
Mass of solution = 100+36 = 136 g
Concentraction of solution =
Thus,
Differentiate between homogenous and heterogeneous mixtures with examples.
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s.no |
Homogenous mixture |
Heterogeneous mixture |
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1. |
It has a uniform composition throughout its mass |
It has no uniform composition.
|
|
2. |
It has no visible boundary or boundaries of separation between its constituents. For example solution of sugar and salt. |
It has visible boundary or boundaries of separation. For example mixture of sugar and sand. |
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