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.
The Square, located in the center of the city, is readily accessible by public transportation. Line 1 of the Beijing Subway has stops at Tiananmen West and Tiananmen East, respectively, to the northwest and northeast of the Square on Chang'an Avenue.