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Flashcards in Rates Of Reaction Deck (10)
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1
Q

How do you measure rate of reaction?

A

The rate at which the reactant is used up

The rate at which the product is formed

2
Q

What factors affect the rate of reaction?

A
Temperature 
Concentration 
Pressure of reacting gases 
Surface area of reacting solids 
Use of a catalyst
3
Q

Why do chemical reactions happen?

A

When reactant particles collide with enough energy.

The more frequently particles collide, the greater the amount of successful collisions the greater the rate of reaction

4
Q

What is the equation for rate of reaction?

A

Amount of reactant used or amount of product formed/ time taken

5
Q

Why may a graph showing rate of reaction be steeper at the start?

A

It is happening faster because the concentration of reactant is the biggest

6
Q

Why does concentrations affect the rate of reaction?

A

There are more reactant particles in the same volume, there is a greater chance of the particles colliding which means more successful collision and a greater rate of reaction

7
Q

Why does surface area affect the rate of reaction?

A

More particles are exposed to the reactants
There is a greater chance of the particles colliding
The rate of reaction increases

8
Q

Why does temperature affect the rate of reaction?

A

The particles have more energy so move more quickly
More particles have the activation energy
The particles collide more often and with more energy so the rate of reaction increases

9
Q

Why does a catalyst increase the rate of reaction?

A

Increases the rate of reaction without being used up
Catalyst lower the activation energy
More collisions result in a reaction
Rate of reaction increases

10
Q

Why does pressure affect the rate of reaction?

A

There are more particles in the same volume
Greater chance of them colliding
Increased rate of reaction