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Chapter 18

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

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#1
Front (Question)

How are reaction rates measured?

Back (Answer)

Observing the changes in the quantities of reactants/products over time

#2
Front (Question)

rate =

Back (Answer)

quantity reacted or produced/time change in concentration/change in time

#3
Front (Question)

What units is concentration measured in?

Back (Answer)

mol dm-3

#4
Front (Question)

What do square brackets represent?

Back (Answer)

Concentration

#5
Front (Question)

What does [A] mean?

Back (Answer)

Concentration of A

#6
Front (Question)

What units does [A] have?

Back (Answer)

mol dm⁻³

#7
Front (Question)

What does changing concentration change?

Back (Answer)

Rate of a reaction

#8
Front (Question)

What is rate of reaction proportional to?

Back (Answer)

The concentration of a particular reactant raised to a power

#9
Front (Question)

rate ∝

Back (Answer)

[A]ⁿ

#10
Front (Question)

What is n in rate ∝ [A]ⁿ?

Back (Answer)

Order of reaction

#11
Front (Question)

What are some of the common orders?

Back (Answer)

1) zero order (0) 2) first order (1) 3) second order (2)

#12
Front (Question)

What is zero order?

Back (Answer)

1) concentration of a reactant has no effect on the rate 2) rate ∝ [A]⁰

#13
Front (Question)

What is first order?

Back (Answer)

1) rate depends on concentration raised to the power of 1 2) rate ∝ [A]¹

#14
Front (Question)

What is second order?

Back (Answer)

1) rate depends on concentration raised to the power of 2 2) rate ∝ [A]²

#15
Front (Question)

What is the rate equation?

Back (Answer)

The mathematical relationship between the concentrations of the reactants and the reaction rate.

#16
Front (Question)

What is the rate constant, k?

Back (Answer)

1) proportionality constant 2) converts between the rate of reaction and concentration and orders

#17
Front (Question)

overall order =

Back (Answer)

sum of orders with respect to each reactant

#18
Front (Question)

What is the overall order for the rate equation rate = k[A]ᵐ[B]ⁿ

Back (Answer)

m+n

#19
Front (Question)

What does ∝ mean?

Back (Answer)

proportional to

#20
Front (Question)

Simplify the rate equation rate = k[A]⁰[B]¹[C]²

Back (Answer)

rate = k[B][C]²

#21
Front (Question)

What do the units of the rate constant depend on?

Back (Answer)

The number of concentration terms in the rate equation

#22
Front (Question)

How can you determine the units of the rate constant, k?

Back (Answer)

1) rearrange equation to make k the subject 2) substitute units into the expression for k 3) cancel common units and show the final units on a single line

#23
Front (Question)

How are orders of reaction determined?

Back (Answer)

Experimentally by monitoring how a physical quantity changes over time

#24
Front (Question)

What is continuous monitoring?

Back (Answer)

Plotting graphs from continuous measurements taken during the course of a reaction