Chemistry: Water

TASK: OPEN-ENDED INVESTIGATION ON SOLUBILITY IN WATER-the report The way different types of substances scatter in weewee and the changes that die to particle arrangement as dissolution occurs. a) A disintegrable ionic merge Most ionic compounds including nuclear number 11 chloride (NaCl) atomic number 18 alcohol-soluble in peeing. The sodium chloride watch glass is held together by electrostatic attraction between the irrefutable and negative ions work out during the transfer of electrons. In other words, there atomic number 18 no separate molecules of NaCl but an array of positive and negative ions held tightly together. Water molecules are pivotal, that is, the electron pairs are unevenly overlap out and the atomic number 1s are slightly positive and the oxygen is slightly negative. These polar molecules of water have a strong attraction for the ions of NaCl. When NaCl is set(p) in water, the negative ends of terce water molecules (three oxygen atoms) appropriate and surround a positive ion of sodium chloride (Na). The positive ends of three water molecules (six henry atoms) attach to a negative ion of sodium chloride (Cl)(Refer to diagram 1). This process is called hydration. As the outer(prenominal) ions in the crystal lattice are deceased apart, more(prenominal) water molecules get down the lattice. The thermal agitation of the ions allows them to move from the crystal to the solvent (water).

atomic number 11 chloride change state in water indicates that the attraction forces between water and the ions are stronger than the attractive forces between the positive and negative ions and for water, the hydrogen adhere be! tween the H2O molecules. This reaction is called an ion-dipole reaction. b) A soluble molecular(a) compound The bonding forces holding atoms together within a covalent molecule are really strong. However, molecular crystals as sucrose C11H22O11do not have strong intermolecular forces. Generally, molecular substances that dissolve in water have either a very polar molecules or are able to from hydrogen bonds with water. This is because for a...If you wishing to get a full essay, order it on our website: BestEssayCheap.com

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