Commercial soaps are mixtures of fatty acid salts. Compare with permanent hardness and water hardness . The component of total water hardness that can be removed by boiling the water. Compare with saturated fat . A lipid containing one or more carbon-carbon double bonds.
Unsaturated fats tend to be oily liquids and are obtained from plants.
A substance that is critical for proper functioning of a living organism that the organism is unable to produce in sufficient quantities for itself. A fuel gas used in industrial synthesis of organic chemicals, and in welding, glassmaking, and other high-temperature industrial applications. Water gas made by passing steam over a bed of hot coal or coke. Compare with water softener . Hard water is water contaminated with compounds of calcium and magnesium.