English Deutsch Français Italiano Español Português 繁體中文 Bahasa Indonesia Tiếng Việt ภาษาไทย
All categories

The sea water which evaporates from the seas & oceans into the clouds is salty.But why is'nt the rain water ?

2007-07-12 17:18:24 · 46 answers · asked by faraz 1 in Science & Mathematics Earth Sciences & Geology

46 answers

Water vapor (which eventually becomes clouds) only consists of water (and in the case of clouds, tiny particles that the water condenses on). The salt is left behind. This is why some bodies of water are very, very salty, such as the Dead Sea. It is usually isolated from the oceans, but occasionally it is flooded with sea water. All the water evaporates, but the salt is left behind. It gets flooded again and the water evaporates again, leaving even more salt. This process happens many times. The Great Salt Lake in the US state Utah was formed by an ancient ocean that once existed there. Most of the ocean water evaporated, so the water that's left in the few remaining lakes is very salty.

2007-07-12 17:48:26 · answer #1 · answered by beabria 2 · 0 0

The reason rain water isn't salty like sea water is because most of the salt ions in the ocean are far too heavy to evaporate in sufficient amounts to affect the taste of the rain water. It's the principle behind growing crystals actually.

You take a container of salt water and let it sit in a place where it's not going to be jarred too much and leave the lid off of it. In a few days or even weeks, you'll have salt crystals inside of the container, all crystals form by water carrying ions which when combined with the appropriate matching ions it'll create the crystals be it salt, quartz, fluorite, etc. by the water evaporating. The slower the evaporation the larger the crystals become, the faster the smaller they are.

H2O is much lighter than NaCl in it's molecular weight. H2O = 10 amu's and NaCl = 28 amu's. So the lighter compounds are more likely to evaporate, leaving the heavier ones behind, though the water that evaporates does carry with it the Na+ and Cl- ions within them. The elements are in very small amounts though, so you wouldn't notice them at all if you tasted the raindrops.

2007-07-13 01:16:41 · answer #2 · answered by dkillinx 3 · 0 0

evaporation is a process of recovering the dissolved solute from the solution. When the water from the sea evaporates only water molecules go into the atmosphere leaving behind the salts. ( that is also the reason for the excessive salt in sea water. ) So the water evaporated from the sea has no taste.

the same water molecules join to form the clouds & come back as rain. which is again tasteless. (pure water has no taste). Water acquires the taste when it dissolves the mineral salts in the soil.

2007-07-13 03:09:21 · answer #3 · answered by kanya 5 · 0 0

The water which evaporwtes from the seas and ocean do not contain the salt as the water particles only evaporeting from the seas and from the oceans.That is why the rain water have no salty.
The manufacturing of common salt,(sodium chloride) adopts the same princple.
Since only the water is evapotering from the seas and oceans the salts and other salty products are accumalating in the sea water continioisly. That is why the sea water is salty.

2007-07-13 19:44:57 · answer #4 · answered by rajeswaran 1 · 0 0

Because we like to have salt according to our own liking and taste ! Suppose the hotels provide a fixed quantity of salt in all dishes instead of providing salt sprinklers at the dining table !
In the same way, nature has PREVENTED evaporation, vapourisation of salt when water becomes a cloud from seas. Now we have a choice to collect sea water, allow it vaporise, leaving a residue of salt for our use.
If salt also had evaporated along with rain water from seas, imagine ! It would be worse than that volcanic hot rain !

2007-07-13 16:42:26 · answer #5 · answered by Spiritualseeker 7 · 0 0

Most quantity of water for cloud formation comes from evaporation of sea water, because sea surface is about 75 % of earth surface, and Most part of land has very little areas covered with surface water.
Vaporization of water using heat from the atmosphere and wind is a process taking place at low temperature. In this conditions just water evaporates and the salt remains behind since it cannot vaporize like water, as a result impurities such as salts stay behind and water vapour forms clouds. Water in clouds is condensed back to water as rain which is virtually pure uncontaminated water, except it contains some gases during precipitation as rain. If it has dissolved large quantity of acidic gases like SO2, NO3 etc. Rain is said to be acid rain.

2007-07-13 07:51:26 · answer #6 · answered by Abhijit Purohit 4 · 0 0

Because Salt is left behind when the water from Seas and Oceans gets evaporated and that's why Seas and Oceans' water is so salty.

2007-07-15 03:55:12 · answer #7 · answered by Anonymous · 0 0

Jay is correct only the water is evaporated, but not to a gas to a water vapor. This is how salt is formed, from the evaporation of sea water, the salt it left behind. In some countries these salt ponds are harvested and sold in stores as sea-salt.

2007-07-12 17:57:43 · answer #8 · answered by kahala 2 · 0 0

The rain water is not salty because it is water only that evaporates into vapour n form clouds. The salts,minerals & dissolved solids in sea/ocean water remains back only.

2007-07-13 07:52:05 · answer #9 · answered by yaa--hoo 1 · 0 0

The sea water, when gets evaporated, leaves behind the salt and the water molecules alone get evaporated-that is how salt is prepared. So, rain water does not contain salt.

2007-07-13 04:46:46 · answer #10 · answered by malathiprasad 1 · 0 0

fedest.com, questions and answers