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Alenkinab [10]
3 years ago
9

Differentiate between homogenous matter and heterogeneous matter?​

Chemistry
1 answer:
olchik [2.2K]3 years ago
3 0

Answer:

<u>Homogeneous mixture:</u>

  1. These are called solutions.
  2. It has a uniform composition.
  3. It has only one phase.
  4. It cannot be separated physically.
  5. The particles appear smaller in size.
  6. These are pure substances.
  7. These are not visible easily visible to the naked eye and also through a microscope.
  8. Examples include milk, gasoline, sugar solution, corn oil, fog, etc.

<u>Heterogeneous mixture:</u>

  1. These are called suspensions/colloids.
  2. It has a non-uniform composition.
  3. There are two or more phases.
  4. It can be separated physically.
  5. The particles are either smaller or larger in size.
  6. These are not pure substances.
  7. These are easily visible to the naked eye and also through a microscope
  8. Examples are- a mixture of mud & water, beach sand, vinegar, air cloud, etc.
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Write the Lewis structure for ethanol (CH3CH2OH), the alcohol found in alcoholic beverages, then answer the following questions:
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(1) The number of valence electrons present in the compound is, 20

(2) The number of bonded electrons present in the compound is, 16

(3) The number of lone pair electrons present in the compound is, 4

(4) The number of single bonds present in the compound is, 8

Explanation :

Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.

In the Lewis-dot structure the valance electrons are shown by 'dot'.

The given molecule is, CH_3CH_2OH

As we know that carbon has '4' valence electrons, hydrogen has '1' valence electrons and oxygen has '6' valence electrons.

Therefore, the total number of valence electrons in CH_3CH_2OH = 2(4) + 6(1) + 6 = 20

According to Lewis-dot structure, there are 16 number of bonding electrons and 4 number of non-bonding electrons or lone pair of electrons.

The Lewis-dot structure of CH_3CH_2OH is shown below.

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