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.
St. Peterâs Square is one of the most famous venues in Rome, Italy. The square is located in front of St. Peterâs Basilica within Vatican City. Several special Masses are celebrated in St. Peter's square during various special dates on the Roman Catholic Church's calendar.