4: Pressure and concentration Flashcards
In a reaction involving gases, what happens when the pressure is decreased?
The rate of reaction decreases, less collisions
In a reaction involving solutions, what happens when the concentration is increased?
The rate of reaction increases, more chance of successful collisions
What is the relationship between rate of reaction and concentration?
When the concentration increases so does the rate of reaction, and vice versa
In terms of particles, why does the rate of reaction increase if the pressure is increased?
The particles become more crowded, they don’t gain more energy but because there is more in one space, there is more frequent collisions so the rate of reaction increases
What is the definition of the concentration of a solution?
A measure of how much solute is dissolved in the solvent
Why does rate of reaction increase when concentration increase?
> The more concentrated a solution is the more solute is dissolved in the solvent
If a reaction involves more reactants, it becomes more concentrated.
The particles become more crowded, so there are more collisions/chance of success
How can the concentration of acid be decreased?
Diluting it with water
In chemical reactions, what is the relationship between the amount of product formed compared to the amount of limiting reactant?
They are directly proportional, so the greater the limiting reactant, the more reacting particles there is, so the more product is formed.
