# Rate of Reaction

Chemistry 3

Unit 1 Rate of Reaction

What does rate of reaction mean?

Rate of reaction means how fast and how much product is made in a given time period.

Give  examples of chemical changes:

-Gas release: Smell, smoke, bubbles

-Heat

-Change of colour

-Precipitation

-Mass change

How do chemical reactions take place?

Chemical reactions take place when particles collide with a sufficient amount of energy. The more concentrated a substance is the more collisions there will be and the faster the reaction will take place.

How do you make successful collisions to occur?

-You would have to increase the concentration, as this increases the number of collisions per second increases, and so the rate of reaction increases

-You can also increase the temperature this will allow the particles to gain kinetic energy, so the collisions will be more energetic and frequent, so the collisions will be more successful.

-Increasing the pressure in gases forces particles closer together, increasing collisions to be more frequent

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## Rate of Reaction Chemistry 3

How do you make successful collisions to occur?

-You would have to increase the concentration, as this increases the number of collisions per second increases, and so the rate of reaction increases

-You can also increase the temperature this will allow the particles to gain kinetic energy, so the collisions will be more energetic and frequent, so the collisions will be more successful.

-Increasing the pressure in gases forces particles closer together, increasing collisions to be more frequent

What is the calculation for rate of reaction

rate of reaction = total amount of reactant used or product made ÷ time taken

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