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Oxidation - One mole of a substance is equal to 6.02 X 10...

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Oxidation-Reduction Reactions Oxidation is the loss of elecrons from an atom or molecule. It is also the loss (removal) of hydrogen atoms from a molecule. A loss of energy is associated with the loss of electrons or hydrogen atoms. Reduction is the gain of electrons or the gain of hydrogen atoms. This process stores energy. Oxidation and reduction occur together. When a atom or molecule is oxidized, another must be reduced. Example: Na + Cl Na + Cl - - The Na is oxidized; the Cl is reduced. Electrons (or hydrogen atoms) function as energy carriers. An atom or molecule that is reduced (gains electrons or hydrogen atoms) also gains energy as a result of the oxidation. Similarly, oxidation is associated with the loss of energy. Reactions in which one atom or compound is reduced and another is oxidized are called redox reactions. The Concept of the Mole
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Unformatted text preview: One mole of a substance is equal to 6.02 X 10 23 (Avogadro's number) particles of the substance. For example, one mole of glucose contains 6.02 X 10 23 molecules of glucose. One mole of a substance has a mass in grams that is equal to the sum of the mass number of each atom in one molecule of the substance. For example, if we sum the mass numbers of each of the atoms in one molecule of glucose (C 6 H 12 O 6 , carbon is 12, hydrogen is 1, and oxygen is 16) we get 72 + 12 + 96 = 180. One mole of glucose (6.02 X 10 23 molecules) has a mass of 180 grams. This is convenient for chemical calculations because one mole of any substance has 6.02 X 10 23 particles. The concentration of solutions can be measured as the number of moles of solute dissolved in one liter of solvent. This measurement is called the molarity of the solution....
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