知识点讲解柠檬汁呈酸性,里面有很多带正电的离子,而牛奶中含有大量的蛋白质,蛋白质呈弱的负电性。当向牛奶中倒入柠檬汁,由于异性相互吸引,大量的蛋白质以正离子为中心聚集在一起,从而使牛奶结块。蛋白质的营养价值因此降低,吃下去对人体是有害的。这就是牛奶加柠檬汁结块的原因。 Knowledge point to explain acidic lemon juice, there are many positive ions, and milk contains a lot of protein, protein was weak negative. When pouring lemon juice into milk, a large number of proteins are clustered around the positive ions due to attraction of the opposite sex, causing the milk to cake. As a result, the nutritional value of the protein is reduced and it is harmful to the human body. This is why milk and lemon juice caked.