Rates of Reaction

Question 1

Rate of reaction

Answer 1

change in concentration per unit time of any one reactant or product.

Question 2

Instantaneous rate of reaction

Answer 2

rate of reaction at any one particular time during the reaction.

Question 3

Catalyst

Answer 3

substance that alters the rate of chemical reaction but is not consumed in the reaction.

Question 4

Enzyme

Answer 4

substance that is produced by a living cell and acts as a biological catalyst.

Question 5

Homogeneous catalysis

Answer 5

both the reactants and the catalyst are in the same phases

Question 6

Heterogeneous catalysis

Answer 6

reactants and the catalyst are in different phases.

Question 7

Autocatalysis

Answer 7

one of the products of the reaction acts as a catalyst for the reaction.

Question 8

Activation energy

Answer 8

minimum combined energy of particles for effective collisions.

Question 9

Adsorption theory

Answer 9

one or more reactants are adsorbed onto the surface of the catalyst. Reactants form new stronger bonds between each other and product diffuse away.

Question 10

Effective collision

Answer 10

collision which reaches activation energy.