ANSWER:
The Cu(NO3)2 acts as a catalyst of the reaction. A trace of Cu(NO3)2 decreases the reaction time and increase the reaction rate, this means that reaction is completed in less time than when Cu(NO3)2 is not present.
Remember that a catalyst decrease the activation energy of any reaction causing that reaction would be completed in less time and with a great rate.
When a catalyst is added, the reaction law of this reaction changes to:
The catalyst is included in the reaction law expression.
2. What conclusions can be drawn about the effect of a trace of Cu(NO3)2 on the...