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BASIC CHEM 2 - of solution(molarity WATER 1 Cohesive...

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Weak Bonds: A bond which is the result of very weak electrical attractions between atoms bearing  partial electrical charges are HYDROGEN BONDS. One atom involved must be  Hydrogen MOLECULES AND COMPOUNDS: A compound is : A molecule is : Molecular formulas: A shorthand way to represent the types and numbers of different atoms present in a  molecule. Isomers: Molecular Weight: The sum of the atomic masses of all the atoms in a molecule water H 2 O 18 (1x2) + 16 Carbon Dioxide Sucrose CONCENTRATIONS OR NUMBERS OF MOLECULES: The amount of a compound equal to its molecular weight in grams always contains the same number of molecules (6.022 x 10 23 ). This is known as Avogadro's Number. 18 grams of water contains the same number of molecules as? ___ grams carbon dioxide ___ grams sucrose
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In solution the concentration of a compound is measured by the number moles/liter
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Unformatted text preview: of solution (molarity). WATER: 1) Cohesive, Adhesive 2) High specific heat, 3) High heat of vaporization 4) lower density as solid compared to liquid. 5) solvent for polar molecules DISSOCIATION: Many molecules come apart when placed in water. The molecule is said to dissociate or break-up into its constituent ions ACIDS, BASES, and SALTS If a molecule dissociates and releases H+ ions then it is called a acid If it releases OH- or accepts H+ it is called a base. If a molecule releases is some other + ions (cation) pH SCALE:: Acidity of a solution is measured by the pH scale which is calculated as the pH = -log[H+] A solution with a pH of 1 has 10-1 moles of H+ /liter a MOLE is Avogadro's number (6.022 x 1023) of molecules Relationship between [H+] and [OH-] Buffers What do they do? How do they work...
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