Separation of salt water, how to separate salt and water three methods

If you want to be more pure.

Then add sodium carbonate in excess and filter because I don't know what substance contains calcium ions, so the equation is not easy to write, and it is temporarily treated as cacl2.

Na2CO3+CaCl2=CaCO3+2NaCl is then added with excess dilute hydrochloric acid to remove excess sodium carbonate.

Na2CO3 + 2HCl = 2NaCl + H20 + CO2 If the requirements are not strict, it is OK not to add dilute hydrochloric acid.

You blow into it, it will definitely save money, as long as there is gauze when separating, a little thinner, a little denser. It's just going to tire you A few more people blow it together, it doesn't seem to save money Forget it, let's just buy sodium carbonate, there's really no way. With such a large amount and trying to save money, this is the case.

co32-)+ca2+====caco3

Are you looking for salt water, why not just add a few more tons of water to it? This seems to be the most cost-effective. Salt should not be expensive, you can rest assured, no matter how financial crisis, salt will not be expensive, and the state will not let it be expensive. Give it a try.

The addition of excess sodium carbonate increases the number of sodium ions in the brine.

I think it's better to use carbon dioxide to introduce an excess of carbon dioxide, which dissolves in water and forms bicarbonate ions, which react with weakly alkaline substances in the water to form carbonate ions, which combine with calcium ions to form precipitates, and the rest of the carbon dioxide goes into the air.

Add excess sodium carbonate.

Well, if it is tens of T, you can consider introducing excess CO2, and Ca+ can react with CO2.

Sodium carbonate (i.e. soda ash, also called soda) is relatively cheap, and impurity ions are not introduced after the reaction.

ca2+co3 2- =caco3↓

CO2 gas is introduced.

Air can too

There is caco3 precipitation

Definitely save money

Blow the air and pass the carbon dioxide directly to precipitate and then filter it on the line, hehe, it's very cost-effective!

Add sodium carbonate (soda) directly and excessively stir the reaction completely and filter

Blowing is not practical!!

Add sodium carbonate,,, soda (baking soda).

Stir. Filtration.

That's the white one.

Blow. CO2 and calcium ions are combined with water to form calcium carbonate.

It is recommended that you study semi-permeable membranes. If it succeeds, it will be most convenient.

carbon dioxide or sodium carbonate.

A large amount of air can make the water smelly, it should be caused by bacterial dust in the air...

The introduction of large amounts of CO2 will acidify the water.

And the amount of soda who can be controlled, if the excess will alkalize the water!

What else is this water for??

And when to add water, how to ensure that it fully reacts.

Sodium carbonate is baking soda and is not expensive.

The three methods for separating table salt and water are as follows:

1. Evaporation crystallization method: The brine is heated to evaporate the water, so that the salt crystallizes and finally achieves the separation of the brine.

2. Distillation method: Collect steam to condense it into water, and the residue left after the brine is boiled dry is salt.

3. Cooling crystallization method: heat the solution first, evaporate the solvent into a saturated solution, and then reduce the temperature of the solution, the solubility of the salt will be reduced, and the salt will be crystallized.

The principle of evaporation is the process of using the method of heating to make the solvent in the solution continuously volatilize and precipitate the solute. Evaporation can be carried out at any temperature, and the heat should be absorbed from the liquid during evaporation, so that the temperature of the liquid is reduced, so evaporation has a cooling effect.

Attention needs to be paid to evaporation crystallization, and it is necessary to use glass rods to stir continuously during the evaporation process to prevent the local temperature from being too high and causing the liquid to splash; When a large amount of solids are precipitated, the heating should be stopped and dried with waste heat; The hot evaporation dish should not be placed directly on the laboratory table, and the asbestos net should be padded; The liquid in the evaporation dish does not exceed 2 3 of the volume.

Salts refer to a class of compounds in which metal ions or ammonium ions (NH4) are combined with acid ions or non-metal ions. Such as sodium chloride, calcium nitrate, ferrous sulfate and ammonium acetate, calcium sulfate, copper chloride, sodium acetate, etc.

Salt can be dissolved in water and can also be separated from water, people take advantage of this characteristic of salt, introduce seawater into the salt pan, use the heat of the sun to evaporate the water in the seawater, and finally precipitate the crystallization of salt.

First, distillation:

2. Cooling and filtration method: cool the brine solution to precipitate the salt from the brine, and then filter the crystals from the precipitated solution.

third, the evaporation method (similar to the distillation method); It is to heat the solution four, crystallization method: add a substance to bind it with sodium chloride (or other salts), in filtration example: distillation.

Distillation is to turn the water into steam, and put the brine into a beaker with a tube on the upper part of the beaker that leads to the outside of the lid, and the tube is connected to another beaker through a basin of cold water. When the beaker is heated, the water evaporates, condenses and flows into the beaker, leaving the salt in the first beaker.

Example: Reverse osmosis.

Reverse osmosis method is to apply pressure to the liquid on one side of the membrane, when the pressure exceeds its osmotic pressure, the solvent will reverse osmosis in the direction of natural osmosis, and use reverse osmosis to treat the brine, so as to obtain fresh water on the low-pressure side of the membrane and obtain high-concentration brine on the high-pressure side. The second method is less specific and practical than the first.

1. Distillation method: the water is evaporated and the salt is left, and then the water vapor is condensed into liquid fresh water.

2. Freezing method: freeze the brine to make it freeze, and the salt is separated when the liquid fresh water becomes solid ice. Both methods have drawbacks that are difficult to overcome.

3. Reverse osmosis method: This method uses a semi-permeable membrane to achieve the purpose of separating fresh water from salt, using the method of heating and evaporation, and the materials required are alcohol lamps, tripods, asbestos nets, and evaporation dishes. The steps are as follows:

1. Take the salt water and pour it into the evaporation dish;

2. Light the alcohol lamp at the bottom of the evaporation dish;

3. Extinguish the alcohol lamp before the water completely evaporates;

4. After a period of time, the white crystals that appear are table salt.

Evaporation, the easiest way to do it.

Experiments on evaporation and salt extraction that I learned in junior high school.

This is also the principle of salt drying by the sea.

If it is an industrial sodium chloride solution, it can be enriched and concentrated by membrane treatment first, and then evaporated to reduce energy consumption.

3."Methods for separating salt from water".

1. Heating and evaporating water can be obtained;

2. Reduce the temperature to reduce the solubility of salt, and the brine will enter a supersaturated state, and salt crystals can be precipitated from the brine.

3. It can be placed in the sun to dry and separate.

The process of dispensing each component to different spatial regions or to the same spatial region at different times through appropriate devices or methods by using the differences in physical or chemical properties of each component in a mixture. In fact, separation is a relative concept, and it is impossible for one to separate a substance 100% from a mixture.

Experiments on the method of separating salt from water.

(1) If only the salt is retained, then the water is evaporated directly with heated salt water, and the rest is table salt; Or reduce the temperature to reduce the solubility of salt, and the brine will enter a supersaturated state, and salt crystals can be precipitated from the brine.

2) If the water is to be retained, the salt and water are separated by distillation.

The salt and water in the water are removed by heating the salt water over a fire and heating it until the water is gone, and finally the salt is left.

Evaporate the water directly with heated salt water, and all that remains is table salt.

Heat, boil all the water, and all the solid salt is revealed!

Summary. Hello, I am glad to answer for you that table salt is the separation of water, after separation, water is the separation of water, and the separated water evaporates into the atmosphere. There are three main types of salt mining. 1. It is a mineral salt, that is, a salt mine.

Hello, it is a pleasure to help you solve the problem of salt is the separation of water, and the separation of water is the separation of water, and the separated water evaporates into the atmosphere. There are three main types of salt mining. 1. It is a mineral void salt, that is, a salt mine.

Table salt is the separation of water, and the separated water evaporates into the atmosphere. There are three main types of salt mining. 1. It is a mineral salt, that is, a salt mine.

2. Lake salt is the crystalline salt obtained by drying the water of the lake. 3. Sea salt search is the salt obtained by evaporating seawater. Edible salt is to purify the salt and remove harmful substances.

How salt and water are separated, and where does the water go after separation?

Table salt is the separation of water, and the separated water evaporates into the atmosphere. There are three main types of salt mining. 1. It is a mineral salt, that is, a salt mine.

2. Lake salt is the crystalline salt obtained by drying the water of the lake. 3. Sea salt search is the salt obtained by evaporating seawater. Edible salt is to purify the salt and remove harmful substances.

How are salt and water separated?

If only the salt is retained, then directly use the heated salt water tomato to evaporate the water, and the rest of Sun Jiao is the salt of Qi Servant. If the water is to be retained, the salt and water are separated by distillation.