Water Essay

Water is a medium for metabolic reactions and an important constituent of cells. In most plants and animals, it makes up about 65-95% of their mass. The water molecule is referred to as a dipole, a polar molecule, with a positive (hydrogen) and negative (oxygen) charge, separated by a very small distance. A molecule with a separated charge is polar. A hydrogen bond; the weak attractive force between a hydrogen atom with a partial positive (o+) charge and an atom with a partial negative charge (o-) oxygen can be formed between two atoms. Hydrogen bonds are weak, however in large quantities, like the large number present in water it makes the molecules difficult to separate and gives water a wide range of physical properties vital to life.

Ice is something we use and see every day, whether it is a block in our freezer or an icicle hanging from our roof. Ice is an important, yet subtle, part of our world. Ice is most commonly used to cool down our drinks and if you have ever noticed that ice in different shapes melt at different rates, then you are on to something. Ice with greater surface areas melt faster than ice with lesser surface areas.

Water (H2O) is a good solvent because it is partially polarized. The hydrogen ends of the water molecule have a partial positive charge, and the oxygen end of the molecule has a partial negative charge. This is because the oxygen atom holds on more tightly to the electrons it shares with the hydrogen atoms. The partial charges make it possible for water molecules to arrange themselves around charged atoms (ions) in solution, like the sodium (Na+) and chloride (Cl−) ions that dissociate when table salt dissolves in water.

Hydrogen bonds contribute to a property of water called cohesion or the tendency of water molecules to stick together.

1) Water molecule is formed with 2 hydrogens and one oxygen atom. Water molecule is a polar molecule because both the opposite side of the molecule have opposite charges. And also, atoms are linked by covalent bonds.

(Click Slide) Another unique property of water is its high specific heat capacity. Due to the strong hydrogen bonds that exist between water molecules, a lot of energy is needed to break down the bonds. As the Particle Theory states, particles move faster and further apart when heated. This is why water helps maintains a moderate temperature on Earth and different bodies of water, crucial for the survival of organisms.

Water is the central well being of people and this planet. Life without water is hard to imagine. It’s hard to believe that people around the world live without water. John Thorson once said “Water links us to our neighbor in a way more profound than any other.” The substance that consumes nearly 75% of earth may become contaminated in more areas than we could ever imagine.

Water is a polar molecule made up of on atom of hydrogen and two atoms of

Solvent – A solvent is the liquid that dissolves the solute to create the solution.

The fact that most small biological molecules dissolve in water is very important because all the chemical reactions that take place in cells do so in aqueous solution. Plants cam only obtain mineral salts in solution and human digestion will only dissolve soluble foods, meaning large starch molecules must be broken down into soluble sugars. Also many organisms living in water spend most of their time underwater, yet they require oxygen to respire, and as water is such a good solvent the required oxygen gas is dissolved in water. Water’s solvent properties also allow it to act as a transport medium for polar solutes for example the movement of minerals to lakes and seas and removal of metabolic wastes such as urea and ammonia in urine. Water’s thermal properties relate to its heat capacity.

Liquid water is the best solvent for life to emerge due to its large dipole, the ability to form hydrogen bonds, and to stabilize macro molecules. It is able to orient hydrophobic and hydrophilic molecules and is a strong polar and non-polar solvent. This dichotomy is essential for maintaining stable bimolecular and cellular structures.

beginning when one is searching for life, water is the first thing to look for,

Water a transparent and formless liquid that is one of the most important things that we have on planet Earth. Every living thing needs water to live, so it is considered to be the source of life, by many.

Water is the lifeblood of every living creature on earth. Approximately 70 percent of the earth's surface is covered with water. Thought the wonders of nature, water can take on many different forms, form the water we drink, to the ice we use to chill a glass of lemonade, to the water vapor used to steam clean equipment equipment. It is easy to understand the significance water plays in our lives, but it may be much more difficult ot understand the water that exists below the earth's surface, called groundwater.

Water’s chemical composition is H20. It is two atoms of Hydrogen and one atom of oxygen combined. Water is a necessity. The human body can not go more than three days without a substantial intake of water. Ninety percent of the human body is water. All of our cells need water to do their daily objectives, and if we get to the point where there is not enough water the cell will not be able to do its intended function. The boiling point and the melting point of water is crucial to the Celsius form of measuring temperature. At 100 degrees Celsius, water will boil. At 0 degrees Celsius, water will melt. The oxygen atom is more electronegative than the two hydrogen atoms. This means that a water molecule is polar.