3/25/25, 5:36 AQA GCSE Chemistry Paper 2 Flashcards |
PM
AQA GCSE CHEMISTRY PAPER 2 EXAM QUESTIONS AND
ANSWERS WITH COMPLETE SOLUTIONS VERIFIED
Terms in this set (279)
How do you measure the By measuring the quantity of a reactant used or the quantity of product
rate of a reaction? formed over time
What is the equation for calculating Mean rate of reaction = quantity of reactant used/time taken
the mean rate of a reaction by
measuring the
amount of reactant used?
What is the equation for calculating Mean rate of reaction = quantity of product formed/time taken
the mean rate of a reaction by
measuring the
amount of product formed?
What units can you measure the g/s or cm3/s or mol/s
rate of a reaction in?
How do you calculate the rate of a By measuring the gradient of a tangent drawn at that specific time on the graph
reaction at a specific time from graph
of the quantity of reactant used or
the quantity of product formed?
What are the five factors that can Concentration of reactants in solution, pressure of reacting gases,
affect the rate of a reaction? surface area of solid reactants, temperature and the presence of a
catalyst
What theory can we use to Collision theory
explain how various factors affect
the rate of a
reaction?
Chemical reactions can occur only when reacting particles collide with
What is collision theory?
each other and with sufficient energy
What is the activation energy of a The minimum amount of energy that particles must have to react
reaction?
According to collision theory why It increases the frequency of collisions and so increases the rate of reaction
does increasing concentration of
reactant in
solution increase the rate of the
reaction?
According to collision theory why does It increases the frequency of collisions and so increases the rate of reaction
increasing the pressure of reacting
gases increase the rate of the
reaction?
According to collision theory why It increases the frequency of collisions and so increases the rate of reaction
does increasing the surface area of
solid
reactants in solution increase the
rate of the reaction?
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, 3/25/25, 5:36 AQA GCSE Chemistry Paper 2 Flashcards |
PM
According to collision theory why does It increases the frequency of collisions and makes the collision more
increasing temperature increase the energetic and so increases the rate of reaction
rate of the reaction?
How do you increase the surface Grind it into a powder that has smaller particle size
area of a solid reactant?
What effect does increasing the It doubles it
temperature of a reaction by 10°C
have on the rate of a reaction?
A chemical that changes the rate of a chemical reaction but is not used
What is a catalyst?
up in the reaction
How do catalysts increase the rate of By providing a different pathway for the reaction that has a lower activation energy
a reaction?
How do you know in a reaction that a It is not included in the chemical equation for the reaction
chemical is used in a reaction is a
catalyst?
Where the products of a chemical reaction can react to produce the
What is a reversible reaction?
original reactants
What is the symbol used in reversible
reaction equations that shows that the
reaction is reversible?
How can you change the direction of By changing the conditions; for example heating or cooling the reaction
a reversible reaction?
Describe the energy changes One direction will be exothermic and the other direction endothermic
in a reversible reaction
When is equilibrium in a reversible When the rate of the forward and reverse reactions occur at exactly the same rate
reaction achieved in apparatus which
prevents the escape of reactants and
products?
What affects the relative amount of The conditions
all the reactants and products at
equilibrium in a reversible reaction?
What happens to an equilibrium if The system responds to counteract the change
any of the conditions change?
What does Le Chatelier's principle The effects of changing conditions on a system at equilibrium
predict?
What affect will changing the The system will no longer be in equilibrium and the concentration of all
concentration of one of the the substances will change until equilibrium is reached again
reactants in a reversible reaction
have on the
equilibrium?
What happens when the More products will be formed until equilibrium is reached again
concentration of a reactant is
increased in a reversible
reaction?
What happens when the More reactant will react until equilibrium is reached again
concentration of a product is
decreased in a reversible
reaction?
2/
6
PM
AQA GCSE CHEMISTRY PAPER 2 EXAM QUESTIONS AND
ANSWERS WITH COMPLETE SOLUTIONS VERIFIED
Terms in this set (279)
How do you measure the By measuring the quantity of a reactant used or the quantity of product
rate of a reaction? formed over time
What is the equation for calculating Mean rate of reaction = quantity of reactant used/time taken
the mean rate of a reaction by
measuring the
amount of reactant used?
What is the equation for calculating Mean rate of reaction = quantity of product formed/time taken
the mean rate of a reaction by
measuring the
amount of product formed?
What units can you measure the g/s or cm3/s or mol/s
rate of a reaction in?
How do you calculate the rate of a By measuring the gradient of a tangent drawn at that specific time on the graph
reaction at a specific time from graph
of the quantity of reactant used or
the quantity of product formed?
What are the five factors that can Concentration of reactants in solution, pressure of reacting gases,
affect the rate of a reaction? surface area of solid reactants, temperature and the presence of a
catalyst
What theory can we use to Collision theory
explain how various factors affect
the rate of a
reaction?
Chemical reactions can occur only when reacting particles collide with
What is collision theory?
each other and with sufficient energy
What is the activation energy of a The minimum amount of energy that particles must have to react
reaction?
According to collision theory why It increases the frequency of collisions and so increases the rate of reaction
does increasing concentration of
reactant in
solution increase the rate of the
reaction?
According to collision theory why does It increases the frequency of collisions and so increases the rate of reaction
increasing the pressure of reacting
gases increase the rate of the
reaction?
According to collision theory why It increases the frequency of collisions and so increases the rate of reaction
does increasing the surface area of
solid
reactants in solution increase the
rate of the reaction?
1/
6
, 3/25/25, 5:36 AQA GCSE Chemistry Paper 2 Flashcards |
PM
According to collision theory why does It increases the frequency of collisions and makes the collision more
increasing temperature increase the energetic and so increases the rate of reaction
rate of the reaction?
How do you increase the surface Grind it into a powder that has smaller particle size
area of a solid reactant?
What effect does increasing the It doubles it
temperature of a reaction by 10°C
have on the rate of a reaction?
A chemical that changes the rate of a chemical reaction but is not used
What is a catalyst?
up in the reaction
How do catalysts increase the rate of By providing a different pathway for the reaction that has a lower activation energy
a reaction?
How do you know in a reaction that a It is not included in the chemical equation for the reaction
chemical is used in a reaction is a
catalyst?
Where the products of a chemical reaction can react to produce the
What is a reversible reaction?
original reactants
What is the symbol used in reversible
reaction equations that shows that the
reaction is reversible?
How can you change the direction of By changing the conditions; for example heating or cooling the reaction
a reversible reaction?
Describe the energy changes One direction will be exothermic and the other direction endothermic
in a reversible reaction
When is equilibrium in a reversible When the rate of the forward and reverse reactions occur at exactly the same rate
reaction achieved in apparatus which
prevents the escape of reactants and
products?
What affects the relative amount of The conditions
all the reactants and products at
equilibrium in a reversible reaction?
What happens to an equilibrium if The system responds to counteract the change
any of the conditions change?
What does Le Chatelier's principle The effects of changing conditions on a system at equilibrium
predict?
What affect will changing the The system will no longer be in equilibrium and the concentration of all
concentration of one of the the substances will change until equilibrium is reached again
reactants in a reversible reaction
have on the
equilibrium?
What happens when the More products will be formed until equilibrium is reached again
concentration of a reactant is
increased in a reversible
reaction?
What happens when the More reactant will react until equilibrium is reached again
concentration of a product is
decreased in a reversible
reaction?
2/
6
