20 Reaction time (s) | .nA | 25. 15 1/time |5.gsgrG h of 9. Make a graph (using
ID: 715776 • Letter: 2
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20 Reaction time (s) | .nA | 25. 15 1/time |5.gsgrG h of 9. Make a graph (using Mi reaction rate against temperature. Refer sample graph shown below Questions relating to the experiments: I. What is the effect of increasing the concentration on the reaction time? 2. What is the effect of increasing the concentration on the reaction rate? 3. What is meant by saying that two quantities are directly proportional? 4. What is the effect of raising the temperature on the reaction time? 5. What is the effect of raising the temperature on the reaction rate? Suggest two factors responsible for the 6. Suggest a reason why it is not recommended to carry out the experiment at temperatures higher than result observed. about 60 C 7. Which is the limiting reactant in the temperature experiment? Effect of Temperature on RaExplanation / Answer
Effect of increasing concentration on reaction rate and time
Solution :- On increasing concentration the rate of reaction increase because on increasing concentration the number of effective collision increase and according to rate law equation rate of reaction is directly proportional to the reactant concentration and reaction time decrease.
Meaning of saying two quantity are directly proportional to each other
Solution:-it means if one of the quantity is increase or decrease by a certain factor the other changes in exactly the same way.
Effect of temperature on reaction rate
Solution :- on increasing temp. rate of reaction increase which is given by Arrhenius equation (rate=kA^-Ea/RT)
Factor for it :- 1 on increasing temprature activation energy of reactant molecules decrease
2 On increasing temprature the number of high energy collision increase or collision frequency increase
Limiting reactant
Solution :-if in a reaction more then one reactant is present then limiting reactant are those which consume completely during reaction while others reactants not consume completely
Why reaction not carried out a temperature greater then 60 degree calcius
Solution :- because the reaction occur so quickly that it is not possible to measure the time accurately.
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