4.3 Rates

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

Card preview (24)

Front (Question)

How does increasing temperature increase rate of reaction?

Back (Answer)

particles gain more kinetic energy

Front (Question)

How does increasing concentration increase rate of reaction?

Back (Answer)

more particles in the same volume

Front (Question)

How does reducing particle size increase the rate of reaction?

Back (Answer)

increases surface area more contact between reactants

Front (Question)

How does using a catalyst increase the rate of reaction?

Back (Answer)

reduces activation energy, provides alternative path

Front (Question)

How does changing pressure increase rate of reaction?

Back (Answer)

same particles in smaller volume

Front (Question)

What is collision theory?

Back (Answer)

particles must collide with required energy (activation energy) for the reaction

Front (Question)

What is activation energy?

Back (Answer)

amount of energy particles need to react

Front (Question)

What is collision frequency?

Back (Answer)

how often particles collide with each other

Front (Question)

What is percentage success?

Back (Answer)

what percentage of collisions have enough energy

#10

Front (Question)

What factors affect rate of reaction?

Back (Answer)

pressure concentration surface area catalyst temperature

#11

Front (Question)

What factors affect collision frequency?

Back (Answer)

concentration pressure surface area

#12

Front (Question)

What factors affect percentage success?

Back (Answer)

temperature catalyst

#13

Front (Question)

Name an experiment to measure the effect of surface area on rate

Back (Answer)

marble chip experiment

#14

Front (Question)

Name an experiment to measure the effect of temperature on rate

Back (Answer)

magnesium and acid experiment

#15

Front (Question)

Name an experiment to measure the effect of catalyst on rate

Back (Answer)

hydrogen peroxide experiment

#16

Front (Question)

Why are catalysts not included in the equation?

Back (Answer)

because they are unchanged in the reaction

#17

Front (Question)

Which catalyst is used in the hydrogen peroxide experiment?

Back (Answer)

manganese oxide

#18

Front (Question)

How is the scientist able to retrieve the catalyst?

Back (Answer)

it is not used up in the reaction

#19

Front (Question)

What is a catalyst?

Back (Answer)

substance that increases rate of reaction but remains chemically unchanged

#20

Front (Question)

How do catalysts work?

Back (Answer)

provide an alternative pathway percentage of collisions with enough energy is higher more successful collisions

#21

Front (Question)

Name an experiment that can demonstrate the effect of concentration on rate

Back (Answer)

disappearing cross experiment

#22

Front (Question)

What is the disappearing cross experiment?

Back (Answer)

react sodium thiosulphate solution with hydrochloric acid

#23

Front (Question)

In the disappearing cross experiment, which solid is produced?

Back (Answer)

sulphur

#24

Front (Question)

What is the equation for the disappearing cross experiment?

Back (Answer)

sodium thiosulphate + hydrochloric acid -> sulphur + water + sulphur dioxide