Rate equations Flashcards
1
Q
formula for rate
A
rate = [ ] / time
2
Q
what will happen if a large excess of reactant is used
A
will mean the order of reaction is zero with respect to that reactant as the reactants concentration is effectively constant
3
Q
how are units of K worked out
A
total order - Rate + s-1
4
Q
2 methods of determining orders of reaction
A
- continuous monitoring method
- initial rates method
5
Q
how is continuous monitoring carried out
A
- samples at regular intervals
- using a visible indicator
6
Q
how do you stop to see how much NaOH is left if the reaction is still reacting
A
- quench the reaction
- add large volume of cold distilled water,cool reaction decrease rate
7
Q
formula for gradient
A
gradient = change in Y / change in X
8
Q
How is zero order shown on a CT graph
A
- gradient is constant as conc decreases
9
Q
when rate is barely changed and [ ] has no effect on rate what is the order
A
zero
10
Q
when the rate is directly proportional to the [ ] what is the order
A
first
11
Q
when the [ ] doubles the rate increases by 2^2 what is the order
A
second
