record time and pH of three trails and then calculate [H+] (I already did this..
ID: 817900 • Letter: R
Question
record time and pH of three trails and then calculate [H+] (I already did this... see picture)
1. caluculate the initial rate of disappearance of TBCl for the three trials
2. how did the initial rates change as the initial concentration of TBCl decreased? (the answer is the initial rates of H+ increased as TBCl decreased)
3. how should the rates have changed as the concentration of TBCl was cut in half?
4. Will decreasing the TBCL concentration affect rate constant in this experiment? explain why?
Record time and pH of three trails and then calculate [H ].Explanation / Answer
1) rate of reaction =change in concentration of reactant/change in time
=(0.00000000199-0.00000000178)/(5-0)=4.2*10^-8mole.lit^-1 sec^-1
second trial
*rate of reaction= 0.0000000851-0.0000000122/5-0=145.8*10^-7 mole.lit^-1 sec^-1.
third trial
rate of reaction=0.0000000407-0.0000000234/(5-0)=34.6*10^-7 mole lit^-1 sec^-1
2) as the time in progress the concntration of the reactant decreases.generally rate of the reaction is directly propotional to the concentration of the reactants.
3)rate of the reaction is directly propotional to the concentration of the reactants.therefoe if the concentration of the TBCl was cut half the rate of the reaction is also become half
4)) no.becauserate costant of a reaction is independent of the concentration of the reactants.
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