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2009-05-15 14:58:38
2009-05-15 14:58:38

fresh water, because salt water is more dense


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Salt water has a higher boiling temperature than fresh water so it would take longer than fresh water to heat up. this is because of the tendancy for H2O to 'cluster' around and cling to the salt molecules. This means that fresh water will evaporate faster than salt water (depending on the concentration).

Salt water is salty because of chemicals that are dissolved in the water. The water is still H2O, the same as fresh water.

They are both water and having a chemical formular H2O.

the same. the salt isn't evaporated, only the h2o, so fresh and salt water evaporate the same unless there is another liquid in one of the two types of water.

Simple: - water with salt is H2O plus NaCl - water without salt is H2O

Made up of H2O and both support large differences in life forms.

No. H2O is the chemical formula for water. Table salt, sodium chloride, is NaCl.

Well, H2O is water, and salt is NaCl, or sodium chloride. So I'm guessing that H2O Salt means salt water!

Pure and dried salt (NaCl) has no salt.

Water (H2O) freezes at 0°C, and boils at 100°C.

water (liquid H2O) freezes to become ice (solid H2O) at 0 degrees Celsius.

"Fresh" water contains all types of salts including sodium chloride, and calcium chloride. Only distilled water contains no salts, it is pure H2O

H2O is water. Water is ice when it freezes. Water freezes at 32 degrees Fahrenheit / 0 degrees Celsius

HCl is an acid which reacts with NaOH a base to produce H2O water and a salt - in this case NaCl HCl + NaOH = NaCl + H2O

All clouds are made of fresh water. The salt in the sea doesn't evaporate. The cloud is a collection of tiny water droplets.

Density equals the mass divided by the volume. Therefore the greater the mass the greater the density of the object. Salt water has a higher mass per volume than fresh water because the NaCl molecules have a greater mass than the H2O molecules.

This can be used as a lubricant or a coolant at a temperature below freezing of water, but above the freezing point of the liquid. Also, when ice freezes on sidewalks, salt is spread to prevent slipping on the ice.

Well, it's pretty simple. Water is just H2O. But salt water is a mixture of Salt (NaCl - Sodium Chloride) and Water (H2O).

Water is an oxide of hydrogen.

no, sea water is a mix of H2O, sand, salt and others. H2O (water) isn't a metal and salt isn't either

For shear simplicity regular water freezes faster. Salt lowers the freezing point of water, to what degree depends on the chemical makeup of that particular kind of salt. For a more advanced answer we need to study the chemistry of both salt and water a bit more. Salt can contain any number of elements, (Ca-Calcium, Cl-Chloride, Na-Sodium, SO4-Sulfate... etc.) the more particles present of each element the lower the freezing point of water (H2O). When salt is added to water these elements join the chemical makeup of water and the salt basically gets in the way of the chemical interactions between H-Hydrogen and O-Oxygen. The amount of difference greatly varies depending on the amount of salt present and the chemical compound of the salt.

Assuming that the salt is common salt It is a mixture of H2o and sodium chloride

Salt water is a mixture, not a compound. There is water, H2O, and there is salt, NaCl.

No. H2O expands as it freezes. I am a little rusty on my chemistry, but I remember it having something to do with dual-polarity (?) of a water molecule.

Salt makes ice melt faster because it makes the water's melting point become lower. For example pure water normally freezes (and melts) at 0°C (or 32°F), where as water with a high salinity (lots of salt) will freeze at temperatures as low as -20°C (depending on the salinity level.) And simply put, the reason that salt affects the rate of freezing or melting is because NaCl (salt) is a different substance from water (H2O) and both have two different chemical properties. The salt molecules inhibit the hydrogen and oxygen particles from coming together and forming ice. It more or less creates a new solution with a lower freezing (and melting) point. This is why salt is useful for keeping roads and sidewalks from getting icey.

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