What are the properties of water that are important for life to be able to exist?

Question

I'm stuck on this question for my biology project...

Answer 1

First, its polarity, which arises from the fact that water is a bent molecule and not a linear molecule. This polarity gives water the capacity to make hydrogen bonds with other water molecules, causing water to be a liquid at room temperature, despite its low molecular weight, (18 g/mol). Natural gas (CH4) has a molar mass of 16 g/mol and is a gas at room temperature, why? Lack of hydrogen bonding capability in the methane molecule. If water had happened to be linear, the dipoles on the O-H bonds will cancel perfectly, so it could not be a liquid. Each water molecule is surrounded by four other water molecules, so to vaporize water, those hydrogen bonds have to be broken, as you know, a temperature of 100 ˚C is required. Also, water has a wide range of temperatures in which is a liquid, 0˚C to 100 ˚C, perfect for our planet, in which those extremes are not easily reached (at least the 100 ˚C required to make all the water vapor is not reached, that is 212 ˚F and the highest temperature registered on Earth is around 140 ˚F, hot, but not sufficient to evaporate all the water in the planet). As a consequence of this polarity, water has a high dielectric constant, which means, it is capable of dissolving ions. Important in biology, since blood is made up of water and many things dissolved in it, ions like Na+, K+, Ca2+, etc, must dissolve to regulate biological systems. All brings it back to the polarity of water, due to its molecular structure.

Answer 2

a million. water is the yuniversal solvent av life kemistree. 2. water is liquid at established temp...very portant wen life began 3. water hav hi heet kapasity...take lotta kalorees tu raes temp 4. wen water freez, the ies variety on appropriate insted on backside

Answer 3

Water is soluble. thats the thing of importance water dissolved organic chemicals and other chemicals creating a bath of reactions to occur and thus life.

Answer 4

Four huge reasons at this site---
http://www.eadshome.com/Water.htm

In addition, the water cycle of evaporation and condensation assures us that water molecules will always be replenished back to earth, in fact, the water you drink today may have molecules in it from centuries ago. Pretty neat!

Answer 5

adhesion, cohesion, specific heat capacity, vander waal forces, capillary action etc.

Answer 6

water must be:
clear and pure without additive
except useful natural salt.............