What kind of water is soft water, and what is soft water?

The hardness of water refers to the amount of salts dissolved in water, that is, the amount of calcium salt and magnesium salt. The total amount of calcium and magnesium ions is equivalent to 10 milligrams of calcium chloride, which is called 1 "degree". According to the hardness, the water is divided into hard water and soft water

Below 8 degrees is soft water, 8 16 degrees is medium water, above 16 degrees is hard water, and above 30 degrees is very hard water.

So, got it? Soft water is pure water ......

Since childhood, our family has told us to drink boiled water and drink less cold water. I didn't know what this meant since I was a child, and hot water in China has become a panacea. And drinking water is also soft and hard, that is, the so-called soft water and hard water, are you a little confused when you hear this?

Pure water and space water are soft water, and they are also available in general laboratories.

Soft water refers to water that does not contain or contains less soluble calcium and magnesium compounds. Soft water is less prone to soap and soap, while hard water is the opposite. Natural soft water generally refers to river water, river water, and lake (freshwater lake) water.

Softened hard water refers to demineralized water obtained when the calcium and magnesium salt content is reduced to milligrams. Although boiling can turn temporarily hard water into soft water, it is extremely uneconomical to use this method in industry to treat large amounts of water.

Identification methods

Method 1: Take an equal amount of water sample from each of the two beakers. Add an equal amount of soapy water to each beaker. If there is more foam and less scuss, it is soft water. On the contrary, hard water with less foam and more scum is hard.

Method 2 can also be heated with a beaker, and it is hard water that leaves more scale on the wall of the cup. Because hard water is water that contains more soluble calcium and magnesium substances, after heating, these soluble calcium and magnesium substances are converted into insoluble substances, and it is hard water that precipitates more impurities, and the more impurities, the greater the hardness of the water.

Method 3: Take a clean, dry piece of glass. Drop an equal amount of water at different locations. After it has completely evaporated, the white residue is mostly hard water, and vice versa.

Water is soft water and hard water, and water that does not contain or contains a small amount of calcium and magnesium ions is called soft water, and vice versa is called hard water. The hardness component of water, if it is caused by sodium bicarbonate or magnesium bicarbonate, is temporary hard water (boiling temporary hard water, decomposed sodium bicarbonate, natural insoluble carbonate and precipitation, water from hard water to soft water); If it is caused by sulfate or chloride containing calcium and magnesium, it is permanent hard water and cannot be removed after boiling. Together, these two hardness are called total hardness.

According to the total hardness value of water, the total hardness of 0-30ppm is called soft water, the total hardness of more than 60ppm is called hard water, high-quality drinking water is not more than 25ppm, and the total hardness of high-quality soft water is less than 10ppm. In natural water, unpolluted rainwater and snow water from the city are soft water; Spring water, stream water, river water, and reservoir water are mostly temporary hard water, and departmental groundwater is high-hardness water.

How hardness is calculated:

Hardness = (calcium content mg l * + magnesium content mg l * hard water: 180mg l

Medium hard water: 120mg l-180mg l

Medium soft water: 60mg l - 120mg l

Soft water: 0 mg l - 60 mg l

Specific benefits and advantages.

1.Soft water makes tea, which has the taste of spring water, and feels better and better than tap water;

2.Soft water bathing and combing make the hair smooth and delicate;

3.Drink soft water to prevent the incidence of stone disease and maintain health;

4.Soft water laundry, saving all kinds of detergents by 50% 80%;

5.Soft water reduces the wear and tear of clothes, makes clothes soft after washing, and keeps the color for a longer time;

6.Soft water reduces water heater maintenance;

7.Repair and maintenance of soft water reduction pipelines;

8.Softened water reduces the generation of dirt in sanitary ware.

Modern scientific analysis believes that the water used to make tea is divided into soft water and hard water, the so-called soft water refers to the content of calcium ions and magnesium ions per liter of water is less than 10 milligrams, and the content of calcium ions and magnesium ions exceeds 10 milligrams that is hard water.

Water that does not contain or less impurities such as Mg2+ Ca2+.

Soft water includes distilled water, rainwater, lake water, and snow water.

1. Distilled water: When the water contains relatively high calcium and magnesium ions, it is hard water, and when the natural water is distilled, the ions in the water will be removed, including calcium and magnesium ions, so the distilled water is soft water.

2. Rainwater: The water from rainfall, with a small amount of sulfur dioxide and nitrogen dioxide, will form acid rain. Rainwater is obtained by evaporation of surface water and contains almost no solutes, so it is soft water.

3. Lake water: The integration of lake water is collected by rainwater and rivers in low-lying places on the ground, mainly from rainwater, so it is also soft water.

4. Snow water: Snow is a natural phenomenon, and water condenses in the air and then falls into snow. Snow water is the water produced by the melting of snow and is one of the sources of the freshwater cycle. Its physical and chemical properties are similar to those of rainwater, and it is also soft water.

The difference between soft and hard water

Soft water and hard water are mainly distinguished based on whether they contain soluble calcium, magnesium compounds. Soft water refers to water that does not contain or contains very small amounts of soluble calcium and magnesium compounds, such as rainwater, snow water, or distilled water. Hard water, on the other hand, refers to water that contains a large number of soluble, calcium-magnesium compounds.

Soft water refers to water that contains no or little soluble calcium, magnesium compounds and other salts.

Soft water corresponds to hard water, which refers to water with a high content of soluble calcium and magnesium compounds, rain, snow water, rivers, rivers, and lakes are soft water, and spring water, deep well water, and seawater are hard water, and water usually contains calcium and magnesium ions.

We divide the hardness of water according to the content of these two substances, hardness of 1 degree is equivalent to 10 mg of calcium oxide per liter of water, water below 8 degrees is called soft water, above 17 degrees is called hard water, and between 8 and 17 degrees is called medium hard water.

Soft water is mostly used in life, such as bathing, washing clothes, etc., because it contains too few minerals, which can significantly reduce the precipitation of minerals into dirt, and can also reduce the wear and tear of clothes, so that the clothes are soft after washing, the color is kept longer, and various detergents are saved.

In addition, the taste of soft water is also better, and drinking soft water regularly has certain benefits for the body, which is conducive to smooth hair, delicate hair, preventing the incidence of stone disease, and maintaining health. Cover bend.

Soft water can also effectively inhibit fungi, in the event of skin trauma, frostbite, burns and other accidents, first wash the affected area with soft water, and soak absorbent cotton and gauze with soft water, gently rub the affected area, can quickly heal the wound, and make the edema caused by the burn disappear immediately, this is because the soft water has the effect of promoting the regeneration of cells and tissues.

Dangers of long-term consumption of soft water:

However, if you have been drinking soft water with too little magnesium ion, it will also bring certain harm to the body, and drinking soft water with insufficient magnesium content for a long time will easily lack magnesium ions in the body, causing protein synthesis disorders and neurological disorders, tremors, ataxia, arteriosclerosis and myocardial damage.

Soft water refers to water that does not contain or contains less soluble calcium and magnesium compounds.

Generally stipulated, each liter of water contains 10 mg of calcium oxide for 1 degree, water with hardness less than 8 degrees is soft water, water with hardness equal to or higher than 8 degrees is hard water, China's drinking water quality standards stipulate that the hardness of water can not exceed 25 degrees, mild and moderate hard water is sweet and delicious, beneficial to health, and highly hard water tastes bitter; Soft water is light and tasteless.

Soft water is more suitable for daily water and industrial water, in daily life, boiled soybeans with soft water are cooked quickly; Washing clothes with soft water is quick and clean; Boil water with soft water, which is not easy to form scale.

In industrial production, especially in the food industry, soft water is required, such as brewing water needs soft water below 4 degrees; Soft water is also needed for the processing of pulses and meats to prevent the inorganic salts in the water from binding to the protein gallery matrix, extending processing time, wasting fuel and increasing costs.

The role of softening water

The soft water can completely remove the dirt in the skin cells, delay the aging, and make the cleansed without tightness, and the luster is delicate. Since soft water is rich in organic minerals and has strong detergency power, only a small amount of makeup remover can achieve 100% makeup removal effect, so soft water is a necessity for beauty lovers; Soft water is used for frequent bathing, which can help you relieve dryness, ringworm, dandruff distress, restore normal elasticity**, use soft water kitchen tableware, porcelain smooth as new, no traces of water stains; Reduce the use of detergents by 53%, which is greatly conducive to environmental protection, and reduce the cleaning time of the kitchen by 50%.

The use of soft water toilets, sinks, and bathtubs will no longer be yellow and dirty, and the small holes of the shower head will no longer have white scale, and the water will flow unimpeded.

The use of soft water to wash clothes is soft, clean, and the color is as good as new, the clothing fiber increases the number of washing times by 33%, reduces the use of laundry detergent by 55%, and reduces the maintenance problems caused by the use of hard water in washing machines and other water equipment.

Soft water is natural water that contains only a small amount of soluble magnesium salts and calcium salts, and it can also be said to be hard water that has been softened.

Natural soft water generally refers to river water, river water, lake (freshwater lake) water, etc. The content of magnesium and calcium salts in the softened hard water is reduced to milliliters of demineralized water.

The hardness of the water is too high, the taste is not good, and the water is easy to produce white sediment-like scale; Limescale adheres to the heating vessel or heater, which will prolong the heating time of the container over time and increase the energy consumption.

The known treatment methods for treating drinking water are: activated carbon filtration, ozone sterilization, ion exchange, reverse osmosis, distillation, boiling, etc.

Part of the role of softened water:

1. Prevent water pipes, water heaters, coffee machines, humidifiers, steam irons, bathtubs, shower heads, flush toilets and other household appliances from accumulating scale, frequent blockage, and low thermal efficiency.

2. Brew coffee next to the land and brew tea, with a unique taste and pure taste. Raise flowers, prolong the flowering period, green leaves without spots, and gorgeous flowers. Fish farming to prevent all kinds of fish diseases. Soft boiled rice is full, fluffy, and has a good taste; Sanitary utensils, crystal clear, no stains.

5. Laundry, prevent static electricity, decolorization, deformation, clean tableware, clean without water stains, and improve the gloss of utensils. Clean the kitchen and bathroom, and remove stains and odors strongly. It has strong detergency. Soft water to wash the clothing fibers, will not be hard, brittle, saving the silver key of cleaning supplies.