BIOL 1107 Lecture Notes - Lecture 2: Molar Mass, Molar Concentration, Hydrophile

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8 Sep 2015
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The chemistry of acids and bases happens in aqueous solutions. Substances that readily interact with water: hydrophilic or water loving : polar molecules and ionic compounds are typically hydrophilic. Substances that repel water: hydrophobic or water fearing : nonpolar molecules are hydrophobic. Solution: completely homogenous mixture of two or more compounds. Substance present in the greatest quantity in solution: solvent. One mole = 6. 02 x 10^23 particles (avogadro"s number: the mass of one mole of an element equals its atomic mass in grams, molar mass: the mass, in grams, of one mole of particles. Molar mass of a compound equals the combined mass of its component atoms: molar concentration: number of moles of solute in a given volume of water units: moles/liter or molarity (m) Water forms hydroxide and hydronium ions: sometimes a hydrogen nucleus (also called proton or h+) is transferred from one water molecule to the lone pair of electrons on the other.

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