4.1 - Rates of Reaction Flashcards
What factors effect rate of reaction?
- Surface area
- Concentration
- Temperature
- Catalysts
What happens to rate of reaction as temperature increases?
As temperature increases the rate of reaction also increases. This is because the particles have more kinetic energy. This means more collisions and more successful collisions per unit of time occur.
What happens to rate of reaction as surface area increases?
As surface area increases the rate of reaction also increases. This is because more particles are exposed to other particles. This means more collisions and more successful collisions per unit of time occur.
What happens to rate of reaction as concentration increases?
As concentration increases the rate of reaction also increases. This is because there are more particle per unit volume. This means more collisions and more successful collisions per unit of time occur.
What happens to rate of reaction when a catalyst is added?
When a catalyst is added the rate of reaction increases. This is because catalysts provide and alternative route with lower activation energy. This means more collisions and more successful collisions per unit of time occur.
What does the marble chip experiment show?
The greater the surface area the faster the rate of reaction.
What experiment can be used to show the effects of concentration on the rate of reaction?
the disappearing cross experiment.
Equation for rate?
rate (s-1) = 1 / time taken (s)
Experiment to show the effect of temperature on rate of reaction?
Magnesium and Acid Experiment
In this experiment the higher the temperature the quicker the magnesium disappears.
What experiment can be used to show the effect of a catalyst on the rate of reaction?
Hydrogen Peroxide Experiment
this reaction is usually very slow but when we add manganese oxide it takes a few seconds to finish.
