Chem 1128 UCONN Exam 2 VERIFIED SOLUTIONS, SCORED A+.

Chem 1128 UCONN Exam 2 VERIFIED
SOLUTIONS, SCORED A+




What .happens .at .equilibrium? .- .CORRECT .ANSWER-The .amounts .of .reactants
.and .products .stop .changing .but .the .forward .and .reverse .reactions .don't .stop


Relationship .between .rate .and .concentration .- .CORRECT .ANSWER-Directly
.proportional


Trend .Rate .of .Forward .Reaction .- .CORRECT .ANSWER-Starts .out .fast .but .slows
.down .as .concentration .of .reactant .decreases


Trend .Rate .of .Reverse .Reaction .- .CORRECT .ANSWER-Starts .out .slow, .but
.speeds .up .as .the .concentration .of .the .product .increases


Rate .at .equilibrium .- .CORRECT .ANSWER-rate .of .forward .reaction .= .rate .of
.reverse .reaction


Reaction .Quotient: .Q .- .CORRECT .ANSWER--Allows .us .to .mathematically
.express .the .amounts .of .reactants .and .products .present .at .any .point .in .a
.reversible .reaction .


-"Q" .can .be .at .any .point .in .the .reaction .not .necessarily .when .at .equilibrium

The .Concentration .Reaction .Quotient: .Qc .- .CORRECT .ANSWER-1.) .All
.concentrations .must .be .expressed .in .Molarity .
2.) .Product .concentrations .are .in .numerator .(multiplied .together) .
3.) .Reactant .concentrations .are .in .the .denominator .(multiplied .together) .
4.) .Each .concentration .is .raised .to .the .power .of .its .coefficient .from .the
.balanced .equation .
5.) .Can .only .use .species .in .the .gaseous .or .aqueous .state

The .Equilibrium .Constant: .K .- .CORRECT .ANSWER-1.) .At .equilibrium .Qc .= .Kc .
2.) .Concentrations .must .be .those .at .equilibrium .
3.) .Independent .of .the .starting .amounts .of .reactants .and .products .
4.) .Dependent .on .the .temperature .of .the .system

Law .of .Mass .Action .- .CORRECT .ANSWER-When .a .reaction .has .achieved
.equilibrium .at .a .given .temperature, .the .reaction .quotient .always .has .the .same
.value