If you have a half filled glass of lemonade on table for one week what might happen to the water in lemonade?

The water in the lemonade would evaporate over time, leaving behind a more concentrated lemonade syrup. This is because water molecules are constantly in motion and, when exposed to air, they will escape into the atmosphere as water vapor. The rate of evaporation will depend on several factors, including temperature, humidity, and air circulation. In a warm, dry environment, the water will evaporate more quickly than in a cool, humid environment. Additionally, if there is a lot of air circulation, the water vapor will be carried away more quickly, which will also speed up the evaporation process.