Chemical Reactions

Question 1

rate formula

Answer 1

Rate = Change in concentration/Time

Question 2

Collision theory

Answer 2

A chemical reaction will occur when two conditions are met. Two particles need to collide and they must have enough energy to react. This means the reaction rate will depend on these two factors: Collision rate & particle energy.

It is very important to realize that there are certain things such as concentration, pressure, temperature, catalysts, and particle size that affect the collision rate & particle energies, and therefore directly affect the chemical reaction rate.

Question 3

Reversible reaction

Answer 3

This means that the products can be changed back into the original reactants. There is a forward reaction and a backward reaction.

Question 4

Oxidation

Answer 4

Oxidation is Loss of electrons and gain of oxygen

Mg -> Mg2+ + 2e-

Question 5

Reduction

Answer 5

Reduction is gain of electrons and loss of oxygen.

Cl2 + 2e- -> 2Cl