What will happen if you add 50L of water and alcohol together?

Adding 50L of water and alcohol together will not result in a total volume of 100L. When mixing liquids with different densities, the resulting volume is not necessarily the sum of the individual volumes. In the case of water and alcohol, the molecules of alcohol can fit into the spaces between water molecules, causing a decrease in the total volume. The exact amount of volume change depends on the specific proportions of water and alcohol used.