MIXTURES AND PURE SUBSTANCES

Escolapios Albacete
Mind Map by Escolapios Albacete, updated more than 1 year ago
Escolapios Albacete
Created by Escolapios Albacete about 5 years ago
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Mindmap about Mixtures and pure substances. Mezclas y sustancias puras .
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MIXTURES AND PURE SUBSTANCES
1 Procedures
1.1 Chemical Procedures
1.2 Physical Procedures
2 MIXTURES

Annotations:

  • Can be separated into their different component substances by physical change
2.1 HETEROGENEOUS

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  • We can easily see that it is composed of different substances
2.2 HOMOGENEOUS

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  • We cannot easily see that it is composed of diferent substances.
2.2.1 SOLUTIONS

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  • It is a homogeneous mixture that is formed of different amounts of two or more puere substances.
2.2.1.1 SOLVENT

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  • It's the main component in a solution; it is usually a liquid but not necessary
2.2.1.2 SOLUTE

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  • It is the dissolved substance in a solution.
2.3 SEPARATION TECHNIQUES
2.3.1 DECANTING

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  • Is used to separate liquids with different densities that are not mutually soluble (inmmiscible).
2.3.2 FILTRATION

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  • Is used to separate an undissolved solid from a liquid. The mixture is passed through filters
2.3.3 MAGNETIC ATTRACTIONS
2.3.4 SIFTING

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  • Is used to separate mixtures of powdered solids into different sized particles
2.3.5 PRECIPITATION

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  • Is used to remove solid solutes from a liquid solution
2.3.6 CRYSTALLISATION

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  • A solution is heated and then slowly cooled, or the solvent is evaporated off. Particles of a homogeneous solute (pure substance) gradually form crystals at the bottom of the container.
2.3.7 DISTILLATION

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  • It is used to saparate mutually soluble liquids in a solution. When the solution is heated and boils, the liquids separate because they have different boiling points.
3 PURE SUBSTANCES
3.1 Characteristic Properties
3.1.1 Melting Point

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  • It's the temperature at which a pure substance in solid state changes into a liquid. For each substance, this is the same at the freeezing point.
3.1.2 Boiling Point

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  • Is the temperature at which a pure substance in a liquid state changes into gas. For each substance, this is same at the condensation point.
3.1.3 Density

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  • It is the ratio of a pure substance's mass to its volumen. Density is constant in all states.
3.2 ELEMENTS

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  • It is a pure substance that cannot be broken down into a simpler substance.
3.3 COMPOUNDS

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  • It ias a pure substance composed of two or more elements. These elements are always combined in fixed proportions. It can be broken down into simpler, pure substances ( other compounds, elements or both) by chemical change.
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