Deriving Rate Equations (AQA A-Level Chemistry): Flashcards

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Deriving Rate Equations
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Rate equation definition

Relationship between reactant concentrations & reaction rate

Orders of reaction definition

Powers to which concentrations are raised

Order w.r.t. BB in Rate = k[B]2[D]k[B]^2[D]

2 (second order)

Order w.r.t. DD in Rate = k[B]2[D]k[B]^2[D]

1 (first order)

Order w.r.t. CC in Rate = k[B]2[D]k[B]^2[D]

0 (zero order, not in equation)

Effect of doubling [B][B] when order is 2

Rate increases by factor of 4 (22=42^2 = 4)

Effect of doubling [D][D] when order is 1

Rate doubles (factor of 2)

Effect of doubling [C][C] when order is 0

No effect on rate

Overall order for Rate = k[B]2[D]k[B]^2[D]

3 (sum of orders: 2+1+0=32 + 1 + 0 = 3)

Effect of doubling [B][B], [C][C], [D][D] (overall order 3)

Rate increases by factor of 8 (23=82^3 = 8)

Explore AQA A-Level Chemistry Revision Notes by Topics

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Rate Equations (A Level only)

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Explore AQA A-Level Chemistry Model Answers by Topics

Thermodynamics (A Level only)

Rate Equations (A Level only)

Equilibrium constant (Kp) for Homogeneous Systems (A Level only)

Electrode Potentials & Electrochemical Cells (A Level only)

Fundamentals of Acids & Bases (A Level only)

Further Acids & Bases Calculations (A Level only)

Explore AQA A-Level Chemistry Quizzes by Topics

Thermodynamics (A Level only)

Rate Equations (A Level only)

Equilibrium constant (Kp) for Homogeneous Systems (A Level only)

Electrode Potentials & Electrochemical Cells (A Level only)

Fundamentals of Acids & Bases (A Level only)

Further Acids & Bases Calculations (A Level only)

Explore AQA A-Level Chemistry Exam Questions by Topics

Thermodynamics (A Level only)

Rate Equations (A Level only)

Equilibrium constant (Kp) for Homogeneous Systems (A Level only)

Electrode Potentials & Electrochemical Cells (A Level only)

Fundamentals of Acids & Bases (A Level only)

Further Acids & Bases Calculations (A Level only)

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