The movement of a solvent through a membrane separating two solutions of different concentrations. The solvent from the side of weaker concentration usually moves to the side of the stronger concentration, diluting it, until the concentrations of the solutions are equal on both sides of the membrane.
We manage Trafalgar Square, one of Londonâs most vibrant spaces in the middle of the city. Find out about the history of this heritage site, its statues and its fountains.
SENATE SqUAREâKRUUNUNHAKAâKATAJANOKKA. the government buildings and museums in the historic quarters of. the city centre reflect Helsinkiâs colourful past. Senate Square is the main central square in Helsinki. The first buildings. here appeared in the 1640s, including a church, cemetery and town hall. The town was destroyed during the Greater Wrath (1713-1721), and. the area around the square began to be rebuilt in 1721 at the end of. the Great Northern War.