The document discusses reaction rates and kinetics. It defines reaction rate and states that the concentration of reactants is proportional to the rate of reaction. It also defines the rate constant and rate law formula. A catalyst affects the reaction rate by lowering the activation energy, increasing the frequency of collisions, and increasing the probability of successful collisions. Enzymes are biological catalysts and the collision theory states that for a reaction to occur, reactant particles must collide with adequate energy.

1. GENERAL CHEMISTRY-II (1412)
S.I. # 15
1. Define Reaction Rate:
2. What is the rate formula?
3. Concentration of reactants is ___________ to the rate of reaction.
A) proportional B) inversely proportional C) equal D) not equal
4. Define the rate constant and provide the formula.
5. Write the functionality of the rate law and provide the formula.
6. List 3 ways a catalyst affects the reaction rate.
1. __________________________________________
2. __________________________________________
3. __________________________________________
7. Define Enzyme:
8. What does the collision theory state?

2. 9. If we have the reaction A (g)  2B (g) and the number of moles of A is as
follows:
Time 0 min 5 min 10 min
Moles A 0.100 0.085 0.070
What is the number of moles of B at 10 minutes?
10. For the reaction 3A (g)  2B (g) the number of moles of A present at 25
minutes is found to be 0.22. If the initial number of moles of A and B were 0.050
mol and 0.00 mol respectively, how much B is present at 25 minutes?
11. Consider the combustion of H2 gas 2 H2 (g) + O2 (g)  2 H2O (g)
If hydrogen is burning at the rate of 4.6 mol s-1, what are the rates of consumption of
oxygen and formation of water vapor?