The reaction P + Q ⟶ Z is first order with respect to P and zero order with respect to Q. If so, fill in the blanks in the following.
| Expt | [P] M | [Q] M | initial rate of formation[Z] |
| I | 0.1 | 0.1 | 2 X 10-2 |
| II | _ | 0.2 | 4 X 10-2 |
| III | 0.4 | 0.4 | _ |
| IV | _ | 0.2 | 2 X 10-2 |
Ans: (ii) [P] = 0.2 (iii) Rate = 8.0 x 10-2 (iv) [P] = 0.1
Define the terms molecularity of a reaction. A first order reaction will take 100 minutes to complete 60% of reactant into product. What time will it take to complete 75% of the reactant into product?
Ans: 151.35 minute
Define the terms order of a reaction.
In a first order reaction 40% of reactant gets converted into product in 30 minutes. What time would it require to convert 75% into product?
Ans: 86.36 minute
Define rate law.
Define the terms First order reaction. A first order reaction is 90% complete in 30 minutes. How long would it take to be 99% complete?
Ans: 60 minute
How do concentration, temperature, catalyst and surface area of reactants affect the rate of reaction? Why is rate law an experimental parameter?
Define the half-life period of a reaction.
Cl2 + 2NO ⟶ 2NOCl, the data obtained are:
| Expt. No. | initial concentration of | initial rate of reaction mol-1 L-1S-1 | |
| [Cl2] mol L-1 | [NO] mol L-1 | ||
| 1 | 0.020 | 0.010 | 2.40 x 10-4 |
| 2 | 0.020 | 0.030 | 2.16 x 10-3 |
| 3 | 0.040 | 0.030 | 4.32 x 10-3 |
Determine:
i. Order of reaction with respect to Cl2 and NO and the overall reaction.
ii. If the concentration of Cl2 is [0.50] mol L-1 and NO is [0.40] mol L-1, what is the rate?
Ans: (i) 1 and 2 respectively, overall order = 3 (ii) 9.6 mol L-1 s-1
Define factors affecting on reaction rate.
