In terms of clothes, chemistry can add warmth to life. Nylon, a kind of resin with amide bond in its molecule, is not found in nature and needs to be obtained by chemical methods; Polyester, a kind of fiber synthesized from ethylene glycol and dimethyl terephthalate. There are many similar materials that enrich people's wardrobes. Chemistry is equally important in food. Steamed bread made of soda dough is soft and delicious. All kinds of drinking wine are made from grain and other raw materials through a series of chemical changes. Betel nut is a favorite food of ethnic minorities. Before eating, it must be soaked in hydrated lime and cut into small pieces. It takes some time to eat.
Thanks to chemistry, our house has colorful decorations. The quicklime is soaked in water to make the lime mature, and the hydrated lime is dried on the floor into white hard calcium carbonate, which covers the yellow of the soil and makes the house look neat and bright. Only when steel is chemically refined can we use iron products. Only by chemically processing petroleum can we use lightweight plastics. Chemical calcination of clay can make the house have a beautiful tile surface.
Chemical reaction is the driving force of vehicles. Without the heat released by fuel combustion, the vehicle cannot start at all. Chemical energy is the most primitive source of energy for their actions. Even with electricity as power, we can't forget the great contribution of chemical energy. At present, chemistry is still a means of transportation and plays an important role in people's travel.
Chemistry is in all kinds of activities in people's lives all the time. Detergents are phosphorus-containing compounds, which are widely used in people's cleaning appliances, textiles, papermaking, pesticides and other departments. Sulfuric acid is produced by the combustion of pyrite as an important chemical raw material. Use "aqua regia" to test the purity of gold. Remove the oxide scale by pickling. Use gasoline emulsified rubber as adhesive. Carve glass with hydrofluoric acid. Put out the fire with foam extinguisher. Dissolve under pressure with carbon dioxide to make refreshing soda, and baking soda to make delicious biscuits. Clear the pipe blockage with corrosive drugs. In life, the frequent use of chemistry is not endless, it has been closely linked with life.
Chemistry itself is a magic mirror, which skillfully combines more than 100 elements to form a magical and beautiful world. It turns elemental carbon into two different forms, beautiful and noble diamond and soft and cheap graphite, and plays a joke on people. People will keep groping for progress in his jokes. Our life will enter a bright future with its progress.
The second article
Life is rich and colorful. Inadvertently, people often encounter some perfect combination of chemistry and life. But people seldom pay attention to its subtlety and interest.
Everyone must be familiar with "salted fish". But why can fish be preserved for a long time without corrosion and deterioration with a little salt? The key is salt. The cause of food corruption is due to the action of microorganisms and bacteria. As long as the growth of biological bacteria is controlled, food spoilage can be prevented. The main component of salt is sodium chloride, which is electrolyte, and the osmotic pressure of its saturated solution is greater than that of non-electrolyte solution (protein solution in microbial and bacterial cells). When a solution with high osmotic pressure and a solution with low osmotic pressure are separated by a semi-permeable membrane (such as a cell membrane), solvent molecules will permeate from the side with low osmotic pressure to the side with high osmotic pressure. That is, in the presence of salt solution, water molecules in microbial bacterial cells will continue to enter the salt solution, leading to cell drying and death, thus playing an anti-corrosion role. Sodium chloride not only created a special case of "Immortality of the Dead Sea", but also performed well in the field of anticorrosion.
Water is the source of life, and the hardness of water has a great relationship with human health. Ca2+ and Mg2+ in high hardness water can combine with SO42-, which makes the water bitter and astringent, and also makes people's gastrointestinal function disorder, resulting in temporary waist edema, excessive exhaust and diarrhea, which is the secret of "acclimatization".
Understand chemistry and life, while avoiding the "Great Recession".
1March, 93814th, in the freezing cold of-15℃ in the Belgian city of Sirt, a grand steel bridge across the Albert Canal suddenly made a loud noise, which broke into several sections in less than a few minutes and fell into the river. The chief culprit of this accident is phosphorus in steel. Phosphorus is one of the harmful elements in steel, which can make steel brittle and easy to break when rolling at room temperature. Although it can improve the hardness of steel, it significantly reduces the plasticity and toughness of steel. It can be seen that it is necessary to understand chemistry in life.
Lifestyle is constantly changing, and the relationship between chemistry and life is getting closer and closer. Please always pay attention to your side and the connection between chemistry and life. Please refer to it.