Chemical application in daily life: the use of iodized salt
Iodine is an essential nutrient for human body, and long-term iodine deficiency will lead to iodine deficiency. Edible iodized salt is the simplest, economical and effective method to eliminate iodine deficiency. Iodized salt contains sodium chloride and potassium iodate, which provides iodine for human body. Potassium iodate is unstable and easy to decompose when heated and illuminated, thus affecting the human body's iodine intake. So pay attention when cooking: add salt as soon as you cook it, and don't stew it for too long.
Chemical application in daily life 2: Don't cook tofu with spinach.
Calcium oxalate is a precipitate that the human body cannot absorb. Spinach, onion and bamboo shoots are rich in oxalic acid and sodium oxalate, and tofu contains more calcium salts, such as calcium sulfate. The above substances can undergo a metathesis reaction to generate calcium oxalate precipitation and other substances. From a medical point of view: spinach, onions, bamboo shoots, etc. It is not suitable to mix with tofu at the same time, which will produce calcium oxalate precipitation, which is the cause of stones; From a nutritional point of view, mixed eating will destroy their nutrients.
Application of chemistry in daily life III: Why can fruit relieve alcoholism?
Because fruits contain organic acids, such as apples containing malic acid, oranges containing citric acid and grapes containing tartaric acid. The main component of wine is ethanol, and organic acids can interact with ethanol to form esters to achieve the purpose of hangover. Similarly, vinegar can relieve alcoholism because it contains 3-5% acetic acid, which can react with ethanol to produce ethyl acetate.