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
A Fish in the Water he played in the junior team of Universitario de Deportes, the Peruvian football club he is a supporter of. A controversial section of the book contains harsh criticism of fellow Peruvian intellectuals who at some point had a difference of opinion, mostly political in nature, with Mr. Vargas, for instance the aggression against then dying writer Julio Ramón Ribeyro. In an interview with Clifford Landers (Albuquerque, 5 November 1994), translator Helen Lane mentions that she originally translated the title as ""A Fish in Water", without the article, and it was changed to "A Fish in the Water", thereby losing the