Unit 6.1-6.2

Unit 6.1-6.2 - Unit 6.1 Notes Acid rain is...

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Unit 6.1 Notes Acid rain is regional (meanwhile, air quality is local and ozone depletion/greenhouse effect is global) Acid Deposition: o Acid rain o Acid snow o Fog o Dry deposition (acidic solids) ACID is a substance that releases hydrogen ions (H+) in aqueous solution (Hydrogen ions have lost its only electron and is just a proton) BASE is a substance that accents hydrogen ions (and produces hydrogen ions in aqueous solution) Neutralization: Reaction between an acid and a base to form a salt and water Atomic Mass: mass, in grams, of the same number of atoms that are found in exactly 12 grams of carbon-12 Avogadro’s number : number of atoms in exactly 12 g of carbon-12 Mole: an Avogadro’s number of anything Molar Mass: the mass of one Avogadro’s number of whatever particles are specified. Concentration : amount of a substance dissolved in a given volume of a solvent Molarity ( M): number of moles of a substance present in one liter of solution The addition of an acid or a base to water, changes these concentration H+ molarities can range from more than 1 mol/L to less than .0000000000001 mol/L. Therefore it is more convenient to use a logarithmic scale: pH= -log MH+ negative log makes answer positive… o Acidic solution: pH < 7 o Neutral solution: pH = 7 o Basic solution: pH > 7
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This note was uploaded on 02/04/2011 for the course CHEM 003 taught by Professor Marting.zysmilich during the Fall '06 term at GWU.

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Unit 6.1-6.2 - Unit 6.1 Notes Acid rain is...

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