Properties of water equal to that of the hydrogen ion (), which gives a pH of 7 at 25 °C. Action of water on rock over long periods of time typically leads to weathering and water erosion, physical processes that convert solid rocks and minerals into soil and sediment, but under some conditions chemical reactions with water occur as well, resulting in metasomatism or mineral hydration, a type of chemical alteration of a rock which produces clay minerals. It also occurs when Portland cement hardens. Water ice can form clathrate compounds, known as clathrate hydrates, with a variety of small molecules that can
Water law in the United States motion determined that the state did not have proper standing to proceed with this case without the Cherokee Nation's involvement. Water project law is the branch of state and federal law that deals with the construction, management, financing, and repair of major water projects, including public drainage, irrigation, flood control, navigation and other projects. Some of these projects are constructed and managed by state and local government. But many are constructed and managed by special local improvement districts, which are special political subdivisions of state government. Water project law has had, and continues to have, a significant role in the