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Rate Equation

AQA A Level Chemistry

QuestionAnswer
What is the unit of rate of reaction? What is the unit of rate of reaction? mol dm-3 s-1
Write a rate equation for a reaction that is first order with respect to reactant A and 2nd order with reactant B. Write a rate equation for a reaction that is first order with respect to reactant A and 2nd order with reactant B. r = k [A] [B]2
For a reaction that is second order with respect to reactant A, what will happen to the rate of reaction if the concentration of A is doubled? It will be quadrupled.
Explain what the order of a particular reactant is in terms of the particles of that reactant in the mechanism of the reaction Explain what the order of a particular reactant is in terms of the particles of that reactant in the mechanism of the reaction The order of a particular reactant is the number of particles of that reactant that participate before or during the rate determining step.
What is the order of a particular reactant in the rate equation of a particular reactant What is the order of a particular reactant in the rate equation of a particular reactant "The power to which a concentration is raised in the rate equation
What is the overall order of a chemical reaction. What is the overall order of a chemical reaction. "The sum of all the individual orders in the rate equation.
If a reaction is zero order with respect to a reactant Z what is the effect on the rate of a reaction of increasing the the concentration of Z No effect.
If a reaction is zero order with respect to a reactant Z where must Z be in the mechanism of the reaction? If a reaction is zero order with respect to a reactant Z where must Z be in the mechanism of the reaction? After the Rate Determining Step
What is the unit of the rate constant k in this rate equation? rate = k [A] What is the unit of the rate constant k in this rate equation? rate = k [A] s-1
What is the unit of the rate constant k in this rate equation? rate = k [P] [C] What is the unit of the rate constant k in this rate equation? rate = k [P] [C] mol-1 dm3 s-1
What is the unit of the rate constant k in this rate equation?rate = k [D]2 [B] What is the unit of the rate constant k in this rate equation?rate = k [D]2 [B] "mol-2 dm6 s-1
How does a catalyst increase the rate of a reactant? How does a catalyst increase the rate of a reactant? "Catalysts provide an alternative reaction pathway with a lower Activation Energy. Decreasing the Activation Energy means that more particles will have sufficient energy to overcome the energy barrier and react
The Arrhenius equation is lnK = lnA- Ea/RT. Describe how a graph that could be plotted from a number of values of K(rate constant) and T (Temperature in K) to determine the value of activation energy Ea lnK should be plotted on the y axis, 1/T on the x axis then the gradient is -Ea/R
Created by: JBearfield