1) Consider an one step reaction at equilibrium. What cannot be said about the e
ID: 532880 • Letter: 1
Question
1) Consider an one step reaction at equilibrium. What cannot be said about the equilibrium constant?
- It is pressure dependent
-It is temperature dependent
-It is the ratio of the products over the reactants
-It is the ratio of the rate of the forward reaction over the rate of the reverse reaction
2)Which of the following does not apply to an acid?
-pH greater than 7
-Electron pair acceptor
- Proton donor
-Neutralizes alkaline species
3) Consider the following reaction: O3 + NO --> O2 + NO2
The following is proposed 2 step mechanism for the overall reaction:
O3 --> O2 + O
NO + O --> NO2
The intermediate(s) in the reaction is(are)
-O
-NO
-O3
-All of the above
Explanation / Answer
1.
Equilibrium constant of a chemical reaction is the value of the reaction quotient when the reaction has reached equilibrium. Equilibrium constant value is independent of the analytical concentrations of the reactant and product species in a mixture,
Equilibrium constants are changed if you change the temperature of the system. Kc or Kp are constant at constant temperature, but they vary as the temperature changes.
Answer is It is the ratio of the products over the reactants
2.
pH greater than 7 are base and pH less than 7 are acids.
Hence, answer is pH greater than 7.
3.
O3 --> O2 + O
NO + O --> NO2
A reaction intermediate or an intermediate is a molecular entity that is formed from the reactants (or preceding intermediates) and reacts further to give the directly observed products of a chemical reaction. Intermediates are form in one elementary step and are consumed in subsequent step.
Hence answer is O.
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