Rates of Reactions
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What is the rate of a chemical reaction?
How fast the reaction happens
What needs to happen to particles for the chemical reaction to occur?
The particles must collide.
What happens when you decrease the particle size?
You increase the surface area
When you increase the surface area, what has a higher probability?
increases the chances of particles colliding together
how does increasing the temp. increase the R.O.R?
particles collide more often with more energy.
What happens when you increase the concentration in a chemical reaction and why?
The reaction rate increases since there are more particles in a given volume
What is a catalyst
substances that speed up a chemical reaction that remain chemically unchanged
What are some benefits of using catalysts
reusable cheap
What is an enzyme?
a biological catalyst like saliva (they exist in living things)
How can you follow the course of a chemical reaction
measure the change in mass, volume, + concentration
What do reactants in a chemical reaction turn into?
products
What is the formula for calculating the average R.O.R
Time
What unit is used to measure the mass
gs-1 or g min-1
What unit is used to measure the gas produced
cm3 s-1
What unit is used to measure the concentration
mol l-1 s-1