Chem Lecture 8

Chem Lecture 8 - Standard solution: A solution of known...

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Sheet1 Page 1 Acids and Bases: Arrhenius: Acid: A substance which when dissolved in water produces H+ ions e.g. HNO3, HCl, H2SO4 -HNO3 -> H2O -> H+(aq) + NO3-(aq) ***->HNO3 = NITRIC ACID*** ***->H2SO4 = SULFURIC ACID*** ***->KOH = POTASSIUM HYDROXIDE*** Base: A substance which when dissolved in water produces OH- ions e.g. NaOH, KOH -NaOH(s) -> H2O -> Na+(aq) + OH-(aq) Neutralization Reactions Acid + Base = Salt + Water HNO3 + KOH = KNO3 + H2O Strong acid + strong base = Net ionic equation will always be the same H+ + OH-(aq) = H2O(l) Volumetric Analysis: Experiments involving volumes of solutions in which the amount of substances, etc, can be determined b y Titration: The addition of a solution of known or unknown concentration in small amounts to another solution of unknown or kn o Uses of Titration: Titration may provide information about concentration, volume, atomic mass, or molar mass of substances
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Unformatted text preview: Standard solution: A solution of known concentration Standardization: A titration in which the concentration of a solution is determined. Indicator: A substance (dye) that changes color at or near the equivalence point of a titration e.g.: IndicatorAcid ColorBase color Phenolphthaleincolorlesspink Methyl redredyellow Bromothymol blueyellowblue Equivalence point of Stoiciometric-Point at which stoichiometrically equal number of moles of reactancs are present in a titration End Point: The point at which the indicator changes color in a titration-Indicators are selected so that they change color as close as possible to the equivalence point...
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This note was uploaded on 05/06/2008 for the course CHEM 151 taught by Professor Campbell during the Spring '08 term at Lansing.

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