What is the way to distinguish purified water from salt water? Chemical Methods .

Distinguish between clear water and salt water] Experiment 1 [Equipment] Concentrated brine, clear water, graduated cylinder (cup), tray balance, beaker, etc. 【Steps】 Place two beakers of the same size (preferably 250 ml) on either side of the balance and adjust the balance to balance. Use a graduated cylinder (cup) to hold 200ml of water and concentrated salt water each, and pour them into two beakers respectively.

You will see the balance lose balance and the side of the water will be warped. This shows that salt water is heavier than clean water.

Note] The salt water should be thick, and the density difference with the clear water is obvious. It is best to use a beaker of the same weight. When using a graduated cylinder (cup) to hold 200 ml of salt water and water, try to be as accurate as possible, and do not make too many errors.

Experiment 2 [Equipment] Concentrated salt water, water, raw eggs, potatoes, beakers, etc. 【Steps】 Fill two beakers of the same size with half a cup of concentrated salt water and water respectively. Take a raw egg and put it in a cup of water first, you can see that the egg is sinking to the bottom of the water.

Remove the eggs and place them in a cup of salted water to see the eggs floating on the water. Take a potato and cut it into matchbox-sized pieces. Put it in a cup of water first, and you can see that the potato cubes are sinking to the bottom of the water.

Then take out the potato cubes and put them in a cup of concentrated salt water, and you can see the potato cubes floating on the water. This shows that the buoyancy of salt water is greater than that of clean water.

Note] The concentration of salt water should be large, so that the buoyancy of the water can be significantly different. Eggs should be fresh, bad eggs will float on the surface of the water and cannot be used. If the potatoes are smaller, they don't have to be diced.

Experiment 3 [Equipment] Concentrated salt water, clean water, beaker, small electric beads, No. 1 battery, wire, etc. 【Steps】 Connect 3 No. 1 batteries and 1 small battery bead as shown in Figure 10-9. Insert the two wires into clean water, and you can see that the small electric beads are not lit.

Insert two wires into the concentrated salt water, and you can see the small beads light up. This shows that clean water does not conduct electricity, and salt water can conduct electricity.

Note] The concentration of brine should be large to have a strong conductivity. The purpose of connecting the batteries in series is to increase the voltage and make the small beads shine. If 3 cells do not make the small beads bright enough, you can increase to 4 cells in series.

It is also possible to use smaller beads that are lower than them, which can also achieve the purpose.

Put an egg in the water, the pure water egg will float and the saltwater egg will sink to the bottom.

Let's find the heart hair!! The density of salt water is definitely greater than that of water, so take the same volume. Weigh again!

Add silver nitrate solution dropwise, there is a white precipitate to produce saline, and there is no phenomenon of pure water.

When the sun is exposed, what is dry and there is salt is salt water.

Add the silver nitrate solution. There is precipitation that produces brine.

EDI influent has strict hardness requirements, and salt reflux of concentrated water is sometimes necessary.

The addition is NACL. The purpose is to enhance the electrical conductivity of the water body. Since EDI removes salts from water by electron migration by electric field, pure water has very low electrical conductivity, making electron migration very inefficient.

In order to improve its migration efficiency, the electron migration is improved by increasing the salt content in the concentrated water chamber. Correct addition of NaCl in accordance with the EDI manual will not affect the effluent resistance, or increase the permeate resistance rather than decrease it.

The resin in the water softener plant reacts with the salt and replaces it to generate soft water. This allows the resin to be reused. If there is a lack of salt, the resin reaches a saturated state, and the calcium and magnesium ions in the water cannot be removed, and the water cannot be softened and made without salt.

1. Use a density meter, and the denser is saline.

2. Heat until boiling, measure the boiling temperature, and the huai chain with high boiling point is salt water.

3. Evaporation, and the celery slippery with solid residue is salt water.

4. Put the two conductors into two liquids respectively to test whether they can conduct electricity, and the one that can conduct electricity is salt water.

5. Take two liquids of the same quality, and the smaller one is saline.

Summary. Can purified water be used as salt water The answer is as follows: Salt water and purified water are made by adding salt. Salt water has the effect of anti-virus and sterilization. Purified water, on the other hand, is not. Therefore, pure water cannot be used as salt water.

Can purified water be used as salt water The answer is as follows: Salt water and purified water are made by adding salt. Salt water has the effect of anti-virus and sterilization. Purified water, on the other hand, is not. Therefore, pure water cannot be used as salt water.

Is it okay to use purified water as salt water?

Can purified water be used as salt water The answer is as follows: Salt water and purified water are made by adding salt. Salt water has the effect of anti-virus and sterilization. Purified water, on the other hand, is not. Therefore, pure water cannot be used as salt water.

Answer: 1. Normal saline contains salt and cannot be replaced by pure water. 2. The water used in the configuration of normal saline for infusion is pharmaceutical-grade pure water, and the water quality of the household water purifier is not up to standard. If it is drunk, it can be configured with water from a household water purifier.

Purified water with a little salt can be used as salt water.

Yes, dear, that's okay, salt water is pure water with salt.

But it depends on the use, and I don't have the hygiene and precision that the hospital buys.

What salt is good to add?

Is it possible to have a patient's stomp?

Then it is recommended to buy saline, kiss it, and buy it yourself in the hospital, the hygiene you do is not up to standard, and the effect is poor.

Now the hospital can't buy it.

If you can't buy it, you can only go to another hospital, and you can only go to another hospital, and the pure water itself is not sterilized.

Methods from easy to difficult:

1. Taste with a sense of taste, the salty is brine.

2. Measure the conductivity, the solution conducts electricity is saline.

3. Put the half-boiled eggs in the solution, and the eggs are suspended in brine.

4. Boiled and evaporated, there are crystals precipitated in brine.

5. Measure the temperature of the liquid when boiling, and the low temperature is the brine.

6. Put it in a transparent freezer, and the salt water that freezes after it freezes.

7. Insert the capillary into the liquid, and the lower rise of the liquid level in the capillary is the brine.

8. Add a certain amount of alcohol, and there is turbidity in salt water.

9. Add silver nitrate solution dropwise, and there is a white precipitate of saline.

10. When electricity is applied to the liquid, it is brine that produces yellow-green gas at the anode.

1.With a density meter, the denser is the brine.

2.Heat until boiling, the highest boiling point is the brine.

3.Evaporation, and there are solids left in the brine.

4.Put the two conductors into two liquids separately, and the one that can conduct electricity is salt water 5Take two liquids of the same mass, the smaller one is saline.

Take a small amount of reagent and drop it onto a clean and smooth glass piece, and observe whether there is any residue on the glass after the water evaporates, if there is, then the reagent is a salt solution, otherwise it is water.

1.Add silver nitrate solution dropwise, and the white precipitate is salt water.

2.Use a density meter to put it into the solution to measure the density separately, and the large one is salt water 3Taste the taste, salty for the salted water.

4. Carry out flame color reaction, and the yellow flame is salt water.

1. See whether it conducts electricity, and it is salt water that conducts electricity.

2. Taste the taste, the salty is salted water.

3. Evaporation, white crystals are diluted out of salt water containing NaCl.

4. Put a wooden block, and sink much more for water.

5. Use density to measure density, and the slightly smaller one is water.

6. Add agNO3, and the white precipitate is salt water.

7. Add UO2 (NO3)2 solution, and the yellow Na2U2O7 precipitate is salt water.

8. The flame color is orange for salt water.

1. See if it conducts electricity.

2. Taste the taste.

3. Distillation, there are white crystals diluted for salt water containing NaCl 4, put a wooden block, and sink much more for water.

5. Measure density with density meter.

6. Add BaCl2, and the precipitated one is salt water.

7. Add agno3, and the white precipitate is salt water.

8. Add UO2 (NO3)2 solution, and the precipitate with yellow Na2U2O7 is salt water 9, and the flame color is orange for salt water.

10. The volume is the same, and the specific mass is the same.