Water is one of the most abundant substances on the planet. It can be
found naturally in all three states; solid (ice), liquid (water), and
gas (steam). However, chemically it is very unusual. For example,
water molecules are slightly polar i.e. they have a positive and
negative end. Due to this difference in electro-negativity the
slightly positive charge on the hydrogen atom is attracted to the
slightly negative charge on the oxygen atom in another molecule. This
bond is called a hydrogen bond and is what causes the water to have
its unusual properties. For example, other molecules of the same size
of water (H2O) are all gases at room temperature and pressure (R.T.P).
Without the hydrogen bonds, water too would be a gas at RTP and would
have a boiling point of -120°C.
Because it is polar, water also has uses as a solvent. Other polar
substance are dissolved by water as the electrostatic attractions
between the water molecules and the ions are greater that the
attraction between the anion and cation. The water molecules surround
the ions and thus the ions become hydrated. Polar substances that
dissolve in water are said to be hydrophilic or "water-loving". The
ability of water to be a solvent has uses in organisms. For reactions
within the body to take place, they usually have to be in solution.
Therefore, using water as the solvent enables more reactions to take
place as more compounds may be dissolved. It is not only human that
use water as a solvent, plants are only able to take up mineral salts
in solution and so use water. Also, organisms that live in marine
environments still need oxygen to respire. The only reason they
survive is because oxygen is dissolved in the water. This would not be
possible if the water molecule was non-polar.
As I have said, water is the most abundant molecule on the planet, but
is also the most abundant molecule organisms. The lowest percentage
composition is 20% in seeds, with the highest being 99% in jelly fish.
When in solution, the hydronium and chloride ions formed will be partially surrounded by water molecules via ion-dipole bonds, an electrostatic force of attraction that exists between charges in the ions and the partial charges in the water molecules. Water molecules surrounding ions is called hydration.
Water moves from a high water potential to a low water potential. A low water potential is a high solute concentration. Water potential has the symbol Ψ, sigma. When water potential on both sides is equal then it is known as equilibrium. In this case there is not an absence of movement between the equal water potentials but a movement of water in both directions, maintaining the equilibrium.
Water is very important to have in your body. Water is in charge of transporting nutrients throughout your body, removing waste products, controlling out body temperature, etc.. Without water our body would compl...
The solubility of a substance depends on the used solvent and the temperature and pressure. Solubility results from simultaneous and opposing dissolution and phase joining.To dissolve is to break into smaller pieces.Even if something’s dissolved, the solute is still there.When something is insoluble, you can’t dissolve it, and you can see it floating on the surface of the water.
The Biological Importance of Water as a Solvent and as a Medium for Living Organisms
Water Potential: The water potential of a solution is a measure of whether it is likely to lose or gain water molecules from another solution. A dilute solution, with its high proportion of free water molecules, is said to have higher water potential than a concentrated solution, because water will flow from the dilute to the concentrated solution (from a high potential to a low potential). Pure water has the highest possible water potential because water molecules will flow from pure water to any other aqueous solution, no matter how dilute. When two such solutions (one strong, one weak) are separated by a semi-permeable membrane the water will move from the side with more water to the side with less until both sides are equal (have reached equilibrium). This can be seen in all living cells.
As the sustenance for all humankind, animals, plants and other living organisms, Water is the greatest natural resources on this planet and it is becoming scarcer and more of a necessity. Water is a basic need and not a want in the same way that without air to breathe, cannot sustain life. Safe, clean water and good sanitation is a right. Therefore, the right to safe, clean water means the right to life. According to United Nations human rights are rights inherent to all human beings, whatever our nationality, place of residence, sex, ethnic origin, color, religion, language or any other status. Based on UN definition I am confident to assert that safe, clean drinking water and good sanitation is a basic human
Water has a great number of roles in living organisms, this is largely to do with the structure and covalent bonding in a single water molecule, and between water molecules. Around 75% of the earth is covered in water, and it is reffered to as the most important Biochemical. Its chemical symbol is: H2O In a water molecule there are two bonding pairs and two non-bonding pairs of electrons. These four pairs of electrons repel one another, forming a tetrahedral pattern.
“Drinking water is like washing out your insides. The water will cleanse the system, fill you up, decrease your caloric load and improve the function of all your tissues.” – Kevin R. Stone --
Summary: Without water, there is no way that life would be sustainable on this planet. It is without a doubt our most valuable resource.
Each water molecule consists of one oxygen atom and two hydrogen atoms. The oxygen atom (or the apex of the water molecule) bears a slight electronegative charge while hydrogen possesses a more positive one. Because opposite charges attract, the water molecules are drawn together. When an oxygen atom is linked to a neighboring molecule's hydrogen atom, a bond called a hydrogen bond is formed. In an ice crystal the hydrogen bonds to give the shape of the crystal so that the grid of molecules surrounds relatively to large spaces. In a liquid form, water has no such spaces; so ice is less dense and will float on liquid water. If not for this, great bodies of water would freeze from the bottom up without the insulation of a top layer of ice and all life in the water would die.
Water is the most vital part of life. Water is needed from humans, to plants and other organisms, and to do basically everything. Water allows our bodily functions to work and to remove waste from our bodies. Plants need water to grow, and humans need plants to gr...
Water is our main source of our life. We need it to live, drink, bathe,
Water is an essential nutrient that our body requires every day. Without water human life cannot be sustained. Water deprivation kills faster than lack of any other nutrient. People do not think of water as a nutrient and don’t realize the important role of water in the body functions.
Water covers about seventy one percent of Earth’s surface. Earth is the only planet to have stable bodies of liquid water on its surface which is crucial for all known life forms. Water is a substance which acts as a solvent in which organic compounds can mix, and it is the substance which is thought to be necessary to facilitate the formation of life. There are many forms of water which include ice, liquid, and gas. Because water can exist as a gas, it can be stored in the atmosphere and be delivered as precipitate. Water also helps regulate the climat...