Lipids dissolve in non-polar solvents such as chloroform, benzene and diethyl ether. They do not dissolve in polar solvents such as water. The only exceptions to this rule are the phospholipids, which will partially dissolve in water.
Phospholipids are partially soluble in polar solutions such as water because of the phosphate group at the molecule's head. This phosphate group is polar, and that portion will dissolve in water while the non-polar tail remains insoluble. Phospholipids' partial solubility is integral to their function as cell membranes.
The most common lipids found in nature are the triglycerides. Animal fats and vegetable oils are primarily composed of triglycerides, which may be either saturated or unsaturated. Saturated fats are solid at room temperature and occur most often in animal fat. Unsaturated fats are more common in vegetable oils and are liquid at room temperature.
Steroids are the third type of lipid. Steroids are ring-shaped lipids used in cell membranes and as hormones within the body. Cholesterol is the most common steroid hormone; other common steroid hormones found in humans are estrogen, testosterone, progesterone, cortisol and bile salts. Steroids do not share many physical or chemical properties with other lipids. Their insolubility in water is their primary similarity.Learn More
Zinc nitrate is commonly used in the manufacture of inorganic zinc compounds ranging from catalysts to pigments and mordant in dyeing. This compound is also used in the manufacturing of medicines. Zinc nitrate solution is used as a foliar spray, and it is also added to irrigation water or liquid fertilizer for soil application. Zinc nitrate is an excellent precursor for the production of high-purity compounds and nanoscale materials.Full Answer >
A pure substance contains only one kind of molecule, and a mixture is a combination of two or more pure substances. Distilled water, aluminum foil and table sugar are each made from only one type of particle. However, salt water is a mixture because it contains salt as well as water.Full Answer >
Sand found on the beach, carbonated beverages, the Earth's atmosphere, cake mix and fog are five examples of mixtures. A mixture is a combination of substances that are not chemically bound together and are not in fixed proportions. Most substances found in nature are mixtures.Full Answer >
Air is a homogeneous mixture. In a homogeneous mixture, all of the components are uniformly distributed. This type of mixture contains only one phase of matter: gas, liquid or solid.Full Answer >