Collision theory Flashcards

1
Q

how do we measure a reaction rate?

A

by collecting the gas given over time OR measure change in mass over time OR measure change in colour

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2
Q

what do we do to see if a substance becomes cloudy/ changes colour over time?

A

black cross test - if it disappears under the pot the substance has changed

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3
Q

how can particles only react? what is this called?

A

they collide with enough energy ➡️ collision theory

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4
Q

what 4 things change the rate of reaction?

A
  • temperature
  • surface area
  • concentration
  • and use of a catalyst
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5
Q

increasing the temperature causes …

A
  • particles to move faster
  • collide more
  • faster rate of reaction
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6
Q

increasing concentration causes …

A
  • more particles to collide and react
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7
Q

increasing surface area causes …

A
  • more collisions and faster reaction
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8
Q

using a catalyst causes …

A
  • more collisions

- faster reaction

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9
Q

what is the collision theory?

A

reacting particles must collide with enough energy in order to react

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