Topic 6: rate and extent of chemical change Flashcards
You can find the rate of reaction by…
the amount of product formed, or reactants used up over time.
The steeper the line on a rate of reaction graph…
the faster the rate of reaction.
The line on a rate of reaction graph levels out…
as the reactants are used up.
The more frequent the collisions…
the faster the reaction takes place.
particles must collide with enough______ for it to be successful.
energy
would increasing the concentration of the solutions increase the rate of reaction?
YES
would increasing the temperature increase the rate of reaction?
YES
would increasing volume NOT concentration of the solutions increase the rate of reaction?
NO
would increasing the surface area increase the rate of reaction?
YES
What is the name of the minimum amount of energy particles must have if they are to react?
Activation energy
Why does a catalyst cause the rate of reaction to increase?
it decreases the activation required
What two properties of the collision between particles affect the rate of reaction?
Energy
Frequency
Using collision theory why does increasing concentration increase the rate?
because the higher the concentration the more particles you will have this means chance of successful collision is higher.
Name one more change other than concentration and surface area that change the rate of reaction.
Temperature
The rate of reaction can be measured by dividing the amount of _____ used up or the amount of _____ formed by the _____.
1) reactants
2) products
3) time
To find the rate at a particular time from a graph with a curved line of best fit, you have to find the _____ of the _____ at that time.
1) gradient
2) tangent
to find the rate of reaction you can measure the ____ or the ______ of ___
Mass
Volume of gas
What is a dependent variable?
something that depends on other factors.
What is an independent variable?
the variable the experimenter changes or controls.
Name a piece of equipment that could be used to measure the volume of gas produced
Gas syringe
True or false, at equilibrium all the reactants have reacted to form products.
False
True or false, at equilibrium the amount of products is equal to the amount of reactants.
False
True or false, at equilibrium the rate of the forwards reaction is equal to the rate of the backwards reaction.
True
True or false, at equilibrium both the forwards and the backwards reactions stop.
False
