Unit 10 - rate of reaction Flashcards
What is a rate
a measure of the change that happens in a single unit of time
How to find the rate of reaction
The amount of a reactant used up per unit of time or the amount of a product produced per unit of time
Which apparatus can be used to measure the gas produced from the reaction
gas syringe
How to determine when the reaction is the fastest on the graph
When the curve is the steepest
How to determine when the reaction is over on the graph
When the curve is flat
As the temperature gets higher, the reaction rate ________
increases
What happens to the reaction rate when the reactant’s surface area decreases
The rate of reaction decreases
What is collision theory
The particles must collide with each other with enough energy to break the bond in order to allow the reaction to occur.
Explain why the rate of reaction in concentrated acid is higher than dilute acid
There are more acid particles in concentrated acid so more collision between particles can be happen
Explain why the rate of reaction is higher in hot solution than cold solution
Particles have more kinetic energy so they move faster. Therefore more chances to have successful collision
Explain why the rate of reaction if the reactant’s surface area increases
More atoms are exposed so the chance of collision increases
What is a catalyst
A substance that speeds up the reaction but remain chemically unchanged itself.
What kind of reaction get speeded if the intensity of the light increases
photochemical reaction
