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Flashcards in 5.1 Deck (12)
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1
Q

Rate of reaction

A

The change in concentration of a reactant or a product per unit time

2
Q

Order

A

The order with respect to a reactant is the power to which the concentration of the reaction in the rate equation

3
Q

Rate constant (k)

A

The constant that links the rate of reaction with the concentrations of the reactant raised to the powers of their orders in the rate equation

4
Q

Overall order

A

The sun of the individual orders m+ n

5
Q

Rate of reaction equation

A

Change in concentration of reactant or product/time

6
Q

half life

A

the time taken for the concentration of the reactant to reduce by half

7
Q

rate-determining step

A

the slowest step in the reaction mechanism of a multi-step reaction
(dictates how quickly a reaction can proceed)

8
Q

zero order

A

rate ∝ [A]⁰

  • the rate is unaffected by changing the concentration of A
  • concentraion-time graph is a straight line going down
  • rate-concentration graph is a straight horizontal line
9
Q

first order

A

rate ∝ [B] ¹

  • if B doubles, rate doubles
  • rate is directly proportional to the concentration
  • concentraion-time graph is a downwards curve
  • rate-concentration graph is a straight line going downwards
10
Q

second order

A

rate ∝ [C] ²

  • the change in rate will equal the change in concentration squared
  • if [C] x 2 then the rate x 4
  • concentraion-time graph is a more intense downwards curve
  • rate-concentration graph is an exponential curve going upwards
11
Q

rate equation formula

A

rate = k[A] ˣ[B] ʸ[C] ᶻ

12
Q

how to determine the rate constant using the half life

A

k = ln 2/t₁/₂