Chemistry C3 4.6 Chemical equilibrium.

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What happens in a reversible reaction?
The products of the reaction can react to re-form the original reactants.
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In a closed system, when is equilibrium achieved?
Equilibrium is achieved when the rates of the forward and reverse reactions are equal.
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What can changing the reaction conditions do?
Change the amounts of products and reactants in a reaction mixture at equilibrium.
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Is it the rates of the forward and reverse reactions or the amounts or reactants and products that are equal at equilibrium?
It is the rates of the forward and reverse reactions that are equal at equilibrium, however the amounts of reactants and products remain constant when the reaction is at equilibrium.
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Some chemical reactions are reversible, what does this mean?
It means that the products can react together to make the reactants again.
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What happens in a closed system?
No reactants or products can escape.
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What happens when equilibrium is reached in a closed system?
The rate of the forward reaction is equal to the rate of the reverse reaction, however both reactions continue to happen but the amounts of reactants and products remain constant.
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No reactants or products can escape in what?
A closed system.
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How can the amounts of the reactants and products for a reversible reaction be changed by changing the reaction conditions?
For example increasing the concentration of a reactant will cause more products to be formed as the system tries to achieve equilibrium. Removing a product causes more reactants to react to try to achieve equilibrium and so more product is formed.
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Why is it important to control reactions?
For the purpose of chemical industry.
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What happens if chlorine is added to the reaction ICl+Cl_2 (to and from arrow symbol) ICl_3?
The concentration of chlorine is increased and more ICl_3 is produced.
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What happens if chlorine is removed from the reaction ICl+Cl_2 (two-way arrow symbol) ICl_3?
The concentration of chlorine is decreased and more ICl is produced.
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What is meant by equilibrium?
When the rates of the forward and reverse reactions of a reversible reaction are equal or when the amounts of reactants and products in a reversible reaction are constant.
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To make SO_3 the reaction 2SO_2(g)+O_2(g)(two-way arrow symbol)2SO_3(g) is done in a reactor over a heated catalyst. Why is the SO_3 removed from the reactor as soon as it is made?
So that more of the reactants react or so more SO_3 is produced.
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Other cards in this set

Card 2

Front

In a closed system, when is equilibrium achieved?

Back

Equilibrium is achieved when the rates of the forward and reverse reactions are equal.

Card 3

Front

What can changing the reaction conditions do?

Back

Preview of the front of card 3

Card 4

Front

Is it the rates of the forward and reverse reactions or the amounts or reactants and products that are equal at equilibrium?

Back

Preview of the front of card 4

Card 5

Front

Some chemical reactions are reversible, what does this mean?

Back

Preview of the front of card 5
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