Write difference between Mixtures and compounds
Answers
Difference between Mixtures and Compounds are :-
Mixtures :-
1. In a mixture, the elements or compounds just mix together.
2. The components of a mixture may be present in any ratio.Its composition is variable.
3. There is no new substance formed.
4. A mixture does not have a definite formula.
5. A mixture may be homogeneous or heterogeneous.
6. No chemical reaction takes place and therefore, the formation of mixture is not accompained by any energy change.
7. A mixture shows the properties of its constituents.
8. A mixture can be separated into its constituents by physical methods (like filtration, evaporation, distillation, sublimation, mechanical separation, etc.)
9. A mixture does not have fixed melting point, boiling point, etc.
Compound:-
1. The elements combine or react to form compounds.
2. The compound contains two or more elements in a fixed ratio by mass. Its composition is always fixed.
3. A new substance is formed.
4. A compound has a definite formula.
5. A compound is always homogeneous.
6. The compounds contain two or more elements in a fixed ratio
7. A chemical reaction takes place and therefore, the formation of a compound takes place with absorption or evolution of heat.
8. The properties of a compound are entirely different from those of its constituents.
9. A compound cannot be separated into its constituents by ordinary physical methods. These can be separated by chemical or electrochemical reactions.
10. A compound has a fixed melting point, boiling point, etc.
Answer:
1. Mixtures are the impure substances, made up of two or more physically mixed substances and not in the fixed ratio. Compounds are the pure form, made up of two or more chemically mixed elements and in a fixed ratio.
2. Mixtures can be homogenous or heterogeneous in nature, but compounds are generally homogenous.
3. As said earlier the composition of the substances found in the mixtures are not in fixed quantity, that means their ratio varies, but in the case of compounds the elements are present in fixed quantity, that means their ratio is fixed. Due to this the compound can be named and have certain chemical formula like Sodium Chloride (NaCl), Baking soda, Methane, Salt, etc., but this is not same for the mixtures.
4. As the ratio of the substances present in a mixture is not fixed and so their properties also vary (not fixed) as it depends on the type of substances and the quantity of the elements which are being mixed, whether it is a chemical or physical property. In compounds, new properties (physical and chemical) are retained after the formation of the new compound, and we know the quantity or ratio of the elements present in the compound.
5. Separation of the substances present in mixtures is easy by different physical methods such as filtration, chromatography, evaporation, while in case of compounds the substances are not easy to separate and if done than it is by chemical methods.
6. No new substances are formed from the mixtures, due to the unchangeable properties of its constituents, while there is always formation of the new substances, due to the mixing of the chemical properties of the different constituents.
7. There is no heat change or involvement of energy is observed when mixtures are made, but the formation of compound results in heat change as energy is used or evolved in reaction. Mixtures do not have meting or boiling point, but compounds have fixed melting and boiling point.
8. Examples of mixtures are Alloys like brass, bismuth, chromium, oceanic water (salt and water), mixtures of gases, etc., while Sodium Chloride, Baking soda, Methane, Salt, etc., are the examples of the compounds.