The density is a bit lowered.
You get a mix of alcohol and water You get dull beer.
It dilutes the alcohol content.
it cools it
684 ml
4 litres
There are 3 litres of alcohol in your starting mixture of 4 litres. If you add 6 litres of water you will have 3 litres of alcohol in a total of 10 litres. This is the required strength.
As more alcohol is added to water, the solubility of alcohol in water generally increases. This is because alcohol molecules can form hydrogen bonds with water molecules, making it easier for the alcohol to dissolve. However, there may be a limit to how much alcohol can dissolve in water depending on the type of alcohol and temperature.
Add 5% water
Because the concentration of alcohol is lower; you pay the alcohol not the water.
16%
You mix the pure alcohol with something else, for example, water.
It is usually a mixture of alcohol and water in which 40%, by volume is alcohol.