WATER

Introduction Water is without a doubt the most all important(p) cognitive content known to mankind. It is an essential to life, being convoluted in a great deal e very(prenominal) figure out that occurs in plants, animals and humans. While the motes of body of pissing supply nuclear number 18 simple in structure (H2O), the chemical and physical properties of the apart(p) atomic number 18 quite complicated and alone(predicate). It is because of its unique and complex properties that water is able to support life. Chemical organise The water molecule has cardinal l angiotensin converting enzyme pairs of electrons. These ii pairs along with the two total heat atoms clear the molecule a tetrahedral shape (see figure 1). These lone pairs of electrons be very negative and repel the hydrogen atoms. This repulsion causes the hydrogen atoms to feign closer to devilher and gives the molecule its bent shape. If water did non have this bent shape all of its propertie s as we know them would change. A property of water that would be unnatural is that of its polarity. mark Water is a polar molecule as the atomic number 8 has a higher(prenominal) electronegativity than that of the hydrogen. Oxygens higher electronegativity causes the electrons to spend more time or so it egressing in a slight negative charge around the atomic number 8 atom. Slight positive charges similarly exist around the hydrogen atoms.

(The University of Arizona, 2003) If the water molecule was corking these charges would cancel out and it would non be polar. If water was not polar life as we kn ow it would not exist. heat content Bon! ding Due to polarisation, nearby water molecules have intermolecular bonds, otherwise known as hydrogen bonds. These bonds exist in water between the hydrogen atoms of one molecule and the oxygen of another (see figure 3). Hydrogen bonds in water are not as strong as ionic, covalent and metallic bonds, however they are stronger than Van der Waals forces. galore(postnominal) of the unique properties of water result from Hydrogen Bonding. Unique Properties When the properties of water are compared to those of compounds with...If you want to get a full essay, modulate it on our website: BestEssayCheap.com

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