how does salt effect the density of water?

Answer 1

The density of pure water is 1000 kg/m3. Ocean water is more dense because of the salt in it. Density of ocean water at the sea surface is about 1027 kg/m3.
There are two main factors that make ocean water more or less dense than about 1027 kg/m3: the temperature of the water and the salinity of the water. Ocean water gets more dense as temperature goes down. So, the colder the water, the more dense it is. Increasing salinity also increases the density of sea water.

http://www.windows.ucar.edu/tour/link=/earth/Water/density.html

Answer 2

Salt makes water more dense, along with plankton, particles of stirred up sediment and other things in the water. Back when u-boats prowled the Atlantic they used to take regular samples of sea water to test for density of this kind in order to effectively "trim" the tanks so they could maintain an even keel as they traveled submerged.

Answer 3

Obviously if you dissolve something in water, more stuff is put into said water, so the water becomes more dense. Don't confuse "dissolving" with "mixing," however, in which case this isn't necessarily true.

You might be interested to know that the Great Salt Lake has so much salt that a person can practically sit on it.

Answer 4

salt causes the density of water to increase - this is why you float better on salt water than on fresh water (the difference in density between you and the water is less)

Answer 5

increases it , used in drilling oil wells making it heavier to prevent blow outs.