4: Pressure and concentration Flashcards

1
Q

In a reaction involving gases, what happens when the pressure is decreased?

A

The rate of reaction decreases, less collisions

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2
Q

In a reaction involving solutions, what happens when the concentration is increased?

A

The rate of reaction increases, more chance of successful collisions

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3
Q

What is the relationship between rate of reaction and concentration?

A

When the concentration increases so does the rate of reaction, and vice versa

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4
Q

In terms of particles, why does the rate of reaction increase if the pressure is increased?

A

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

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5
Q

What is the definition of the concentration of a solution?

A

A measure of how much solute is dissolved in the solvent

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6
Q

Why does rate of reaction increase when concentration increase?

A

> 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

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7
Q

How can the concentration of acid be decreased?

A

Diluting it with water

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8
Q

In chemical reactions, what is the relationship between the amount of product formed compared to the amount of limiting reactant?

A

They are directly proportional, so the greater the limiting reactant, the more reacting particles there is, so the more product is formed.

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