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10 Cards in this Set
- Front
- Back
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Difference bewteen Solubility, molar solubility & solubilit product expression
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1.
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Solubility of a compound
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= amount of compound that dissolves in a specified volume of solution., usu expressed as grams/liter
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molar solubility
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= no. moles tha tdissolve to give 1 ltier of saturated solution
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solubility product expression
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product of hte concentrations of its constitudent ions, each raised to the power corresponding to the numbe of ions in 1 formula unit of the compound, or the coefficients
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Most reactions occur in a seris of steps. Exaplin elementary steps
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an individual step in the mechansim by which a reaction occurs, for each elem step, the reactio norders match the reactant coefficients in that step
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Find reaction orders for any single elementary step
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= the coefficients for that step
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Example of an "experimentally determined rate-law expression for aA + bB --> cC + dD
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rate = k[A] (x) [B] (y)
-BUT the values of x and y are related to the coefficnets of hte reactants in the slowest step. |
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Verbally explain r = k[NO(2)] (2)
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a reacction of nitrogen dioxide and carbone monoxide is found to be second order with respect to NO (@) and 0 order wrt to CO.
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Explain reaction in terms of molecules
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if experimentally determined orders do not match the coefficents in the overall balance equation, then the reaction does not take place in 1 step. Usually, rate-detemrining step of the mechani involves a bimolecular collision between two ___ molecules. This is consistent with the rate expression.
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Criteria for plausible meachnism
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1) steps add to give equation for overall reacation
2) mechanism is consistnt with experiemntlaly detemrined rate-law expression (must match slowest step) |
