Filtration in Chemistry Evaporation is the difference between distillation

Filtration: A method of removing solvent-insoluble impurities from a solution.

Evaporation: A method of vaporizing a concentrated solvent of a solution to precipitate the solute in the form of crystals.

Distillation: It is a method of purifying or separating mixtures of liquids with different boiling points.

Extraction: It is a method of extracting a solute from a solution composed of another solvent by using one solvent to use the solubility of solutes in incompatible solvents. Filtering:

It refers to the screening of eligible solubles from an existing batch of substances and the removal of another part of the insoluble substances that do not meet the requirements. Filtration cannot remove the solubles, and the solubles can only be evaporated.

Evaporation: Evaporation is a slow vaporization of a liquid at any temperature on the surface of the liquid.

Distillation: refers to the mass transfer process that separates components by taking advantage of the differences in the volatility of each component in a liquid mixture. It is an evaporation and condensation process in which the vapor produced by the boiling of the liquid is introduced into the condenser tube and cooled and condensed into a liquid.

High school only involves: liquid-liquid extraction, the separation of a component of a liquid mixture with a selected solvent, the solvent must be inmiscible with the liquid of the mixture being extracted, have selective solubility, and must have good thermal and chemical stability, and have little toxicity and corrosiveness. For example, benzene is used to separate phenols in coal tar; separation of olefins from petroleum fractions with organic solvents; Br2 in water was extracted with CCL4

Filtration separates insoluble impurities, and evaporation is like pouring some alcohol on the table, which slowly evaporates and disappears. Distillation is like extracting the salt from the brine and evaporating the water.

Evaporation is generally a gas that is evaporated, such as experiments on coarse salt purification.

Distillation requires the use of a condenser tube to liquefy the evaporated gas into a liquid and collect it.

The difference between filtration and the above is big, you only need to filter out insoluble solids with filter paper Evaporation: remove volatile substances. For example, the NaCl solution evaporates H2O and becomes steam, leaving NaCl

Distillation: The use of evaporation to separate volatile substances from those that are difficult to volatilize, and to collect the evaporated substances. For example, in the process of winemaking, condensation yields wine.

Filtration: Separate the solution from the insoluble solids with filter paper without heating.

Filtration is to separate solid substances from solid-liquid mixtures, evaporation is to turn liquids into gases, and gases are useless, there is no need to collect distillation, first heat the liquid into gas, and then cool the gas back into liquid, usually used for liquid mixture separation and purification.

Filtration principle: The difference in the solubility of substances is used to separate liquids from liquid-insoluble solids.

methods. Scope of application:

Solid-liquid mixing separation.

For example, a filtration method is used to remove a small amount of sediment from table salt.

Evaporation principle: the process of using the heating method to make the solvent in the solution continuously volatilize and precipitate the solute (crystal).

Scope of application: The process by which water is transformed from a liquid or solid state into a vapor state and escapes into the atmosphere.

Example: Purification of coarse salt.

Distillation principle: the difference in the volatility of each component in the liquid mixture is used to partially vaporize the liquid mixture and condense the vapor partially, so as to achieve the separation of the components contained in it.

Scope of application: to separate liquid mixtures, only when the boiling points of each component in the mixture are quite different, a more effective separation can be achieved.

Example: Distilled water experiments.

Extraction principle: The difference in solubility or partition coefficient of compounds in two immiscible (or slightly soluble) solvents is used to transfer compounds from one solvent to another. After repeated extractions, most of the compounds were extracted.

Application: Liquid-liquid extraction.

Solid-liquid extraction.

Example: Carbon tetrachloride is extracted from water with bromine water.

No, filtration is taking advantage of solubility differences.

Distillation is to take advantage of the difference in boiling point.

Filtration: The operation of separating liquids from solids by taking advantage of differences in the solubility of different substances.

Dispensing: The operation of separating two immiscible liquids by taking advantage of the difference in density of different substances.

Extraction: The process of treating a two-component or multi-component liquid that is incompatible with a liquid extractant and separating its solutes.

Distillation: The operation of separating substances by heating, condensing, etc., by taking advantage of the difference in the volatility of substances.

Evaporation: A phenomenon in which the vaporization of the surface of a liquid occurs, at any temperature.

Filtration is a method of separating liquids from liquid-insoluble solids by taking advantage of differences in the solubility of substances. For example, a small amount of sediment in crude salt is removed by filtration. Funnels, beakers, glass rods, iron racks (including iron rings), filter paper.

It is necessary to achieve "one stick, two low, and three reliance".

Even if the filter paper is wet, it will stick to the inner wall of the funnel and leave no air bubbles. (Prevent air bubbles from slowing down filtration.) ）

Two Low 1 The edge of the filter paper is slightly lower than the edge of the funnel. 2 The liquid level is lower than the edge of the filter paper. (Prevent liquid filtration from being unclean.) ）

3. 1 The beaker containing the filtrate is next to the glass rod.

Filter sponge. 2.The lower end of the glass rod is against the three layers of filter paper. 3 The lower end of the funnel is close to the inner wall of the beaker.

Evaporation is a process in which the solvent in the solution is continuously volatilized and the solute (crystal) is precipitated by heating.

Evaporation dishes, iron stands, glass rods, crucible pliers, alcohol lamps.

1.The amount of liquid in the evaporation dish must not exceed 2 3

2.During the evaporation process, a glass rod must be constantly stirred to prevent the local temperature from being too high and the liquid from splashing.

3.When heated to the point where (a large amount) of solids appears, the heating should be stopped and the waste heat should be used to evaporate dry.

4.The hot evaporation dish should not be placed directly on the laboratory table, and the asbestos net should be padded.

5.Crucible pliers are used to grip the evaporation dish.

Extraction takes advantage of the difference in solubility or partition coefficient [1] of a compound in two immiscible (or slightly soluble) solvents to transfer a compound from one solvent to another. After repeated extractions, most of the compounds were extracted.

Instrument: Separating funnel.

Iodine in iodine water is extracted with carbon tetrachloride.

Common extractants: water, benzene, carbon tetrachloride.

Requirements: Extractants and raw solvents are not miscible with each other.

The extractant and solute do not react with each other.

The solubility of the solute in the extractant is much greater than in the original solvent.

Filter stuffiness. Precautions: "one stick, two low, three leaning" If necessary, the sediment should be washed (in the filter) The filtration of quantitative experiments should be "non-destructive";

Distillation. Precautions: The mercury ball of the thermometer is on the lower edge of the branch nozzle of the distillation flask.

Add zeolite (crushed porcelain pieces).

Note that the direction of the water flow of the condenser pipe should be down and up and out of the ant's first spring.

Do not steam dried celery pure;

Purification, filtration is solid separation, and distillation is liquid separation.

Filtration Precautions: To "one stick, two low, three leaning" If necessary, Lu Feng should wash the sediment (in the filter) The filtration of the quantitative experiment should be "no early mountain damage";

Distillation. Precautions: The mercury ball of the thermometer is added zeolite (broken porcelain pieces) at the lower edge of the branch nozzle of the distillation flask, and the water flow direction of the condenser tube should be down and up, and it should not be evaporated;