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 contamination in Lawrence and Morgan Counties, Alabama has toxic effects on the immune system, the endocrine systems, and may also cause tumors. Major manufacturers tried to limit the use of Perfluorooctanoic acid since it's been revealed that water resources have been contaminated with this compound, including industrial sites, municipal waste sites, and industrial wastes. Children exposed to this chemical are at an increased risk of developing thyroid diseases. When the thyroid gland is affected, it can impact other body parts within the human body which can lead to other health symptoms such as growth development. Although the chemical is not visible, the chemical can enter a body's