- Determine the concentrations you would use in order to find therate law for a given reaction.
a.ﾃつﾃつﾃつHere is one set ofconditions ﾃ｢竄ｬ窶 fill out the rest of the table with enough sets ofconditions to determine the rate law for the reaction:
A + B ﾃδ C + D
b.ﾃつﾃつﾃつIf you determinethat the reaction is first order in A and first order in B, fillout the table below with the rate you would expect for each of theconditions you described in part a. (You will have to copy theconditions from part a to the new table.)
[A] mol/L | [B] mol/L | Initial rate mol/(Lﾃ窶芭in) |
1.0 | 1.0 | 2.0 |
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c.ﾃつﾃつﾃつWhat is the rateequation for the reaction?
d.ﾃつﾃつﾃつWhat is the valueof the rate constant?ﾃつﾃつBe sure to include appropriateunits.
e.ﾃつﾃつﾃつIf the reaction iszero order in A and 2nd order in B, fill out the tablewith the rates you would expect.
[A] mol/L | [B] mol/L | Initial rate mol/(Lﾃ窶芭in) |
1.0 | 1.0 | 2.0 |
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f.ﾃつﾃつﾃつﾃつWhat is therate equation for the reaction?
g.ﾃつﾃつﾃつWhat is the valueof the rate constant?ﾃつﾃつBe sure to include appropriateunits.
2.ﾃつﾃつﾃつHow would youdetermine the initial rates of the reactionexperimentally? What measurements would you record and how wouldyou treat the data?
3.ﾃつﾃつﾃつLets say you havea new reaction and you think that the reaction has a rateequation:ﾃつﾃつRate = k[A]2
However, you only have one set of [A]vs time data. Describe how you would determine what the rateequation is from this one set of data.
4.ﾃつﾃつﾃつFor a first orderreaction, graph the concentration of reactant A ([A]) vs time. Onthis same graph indicate two half-life time periods. (That is showwhere the concentration falls by one half, for two timeperiods).
5.ﾃつﾃつﾃつThe carbon-14decay rate of a sample obtained from a young live tree is 0.260disintegrations/(sﾃつｷg). Another sample prepared from anarchaeological excavation gives a decay rate of 0.186disintegrations/(sﾃつｷg). The half-life of carbon-14 is 5730 years.What is the age of the object?
