Rate of reaction

The reaction rate can be determined by measuring ...

• the increasing of reactant during reaction

• how fast the concentration of products decreases

• the decreasing of reactant and products at the same time

• how fast the concentration of products increases

• the time needed for reactant increases

Reactions occur when reactant molecules "effectively collide". Which component of collision theory is represented in the image?

• concentration

• catalyst

• temperature

• orientation

• minimum energy

During a molecular collision, molecules must possess a minimum amount of kinetic energy for an effective collision to occur. This energy varies for each reaction, and is known as the activation energy (E_a). Ea represented by ...

• A

• B

• C

• D

Factors that can affect the reaction rate of a chemical reaction, except ...

• time

• temperature

• concentration

• surface area

• catalyst

An increase in temperature typically increases the rate of reaction because ...

• increase in temperature will increases both the energy of particle and frequency collisions

• increase the temperature will make the number of particle decrease so that less particles will collide

• increase the temperature will change the physical state of the reactant so the particle move slower

• increase in temperature will provide an alternate reaction pathway to obtain products

• increase in temperature will increases both the amount of particle and frequency collisions

The graphic energy show energy level for ... reaction

• exothermic

• endothermic

The graph given show the energy changes during ... reaction.

• exothermic

• endothermic

When two reactants mix, there are two possibilities: reaction will finish when both reactant used up or one of the reactant used up before the other reactant ran out. The reactant which used up before the other reactant ran out is called ...

• limiting product

• catalyst

• soluble solid

• limiting reactant

In standard conditions data for line B was recorded. If we run the reaction again at a higher temperature, which line of data would likely be recorded?

• A

• C

• B

• no reaction

In standard conditions data for line B was recorded. If we run the reaction again with reactants at lower concentrations, which line of data would likely be recorded?

• A

• B

• C

• no reaction