Factors affecting reaction rates

Question 1

Can all catalysts work with all reactions?

Answer 1

No, they are specific to a particular reaction.

Question 2

Do all reactions have suitable catalysts?

Answer 2

No, not all.

Question 3

Do different catalysts cause different reactions?

Answer 3

Yes, they cause unique reactions.

Question 4

How much catalyst is needed to increase the rate of reaction?

Answer 4

Only a small amount within a large amount of reactants.

Question 5

What are catalysts in everyday life?

Answer 5

Catalysts in everyday life are used to affect the rate of reaction in common items.

An example is cars fitted with catalytic converters to reduce harmful gases.

Question 6

What are catalysts in living things?

Answer 6

Catalysts in living things are chemical substances that alter the rate of reaction within a living organism.

Examples include digestive enzymes that speed up the breakdown of food.

Question 7

What are catalysts in the industry?

Answer 7

Catalysts in the industry are used to speed up the rate of reaction in industrial processes.

An example is the production of sulfuric acid.

Question 8

What are the types of catalysts?

Answer 8

1. Catalysts in industry 2. Catalysts in everyday life 3. Catalysts in living things.

Question 9

What does increasing the volume do to the reaction rate?

Answer 9

Increasing the volume of gas decreases pressure, which in turn decreases the rate of reactions.

Question 10

What does surface area mean?

Answer 10

Surface area is the exposed area of a solid substance.

Question 11

What does the concentration of a reactant do to the reaction rate?

Answer 11

Increasing the concentration of a reactant will increase the reaction rate; decreasing the concentration will decrease the reaction rate.

Question 12

What does the term Rate of reactions mean?

Answer 12

The reaction rate is a measure of how quickly a chemical reaction occurs.

E.g., Explosions=Fast rate of reaction, Concrete setting=Slow rate of reaction.

Question 13

What is a catalyst?

Answer 13

A substance which changes the rate of reaction but is unchanged at the end of the reaction.

Question 14

What is a way to increase the pressure to quicken a reaction rate?

Answer 14

Force several gas molecules into a smaller volume (if you have several).

Question 15

What is the effect of Pressure on the rate of reaction?

Answer 15

Increasing the pressure of a gas is the same as increasing its concentration, leading to a faster reaction rate.

Question 16

What is the effect of temperature on the rate of reaction?

Answer 16

The higher the temperature, the higher the kinetic energy, causing reactant particles to move faster and collide more often, increasing the rate of reaction.

Question 17

What would a larger surface area do to a reaction rate?

Answer 17

It would increase the reaction rate due to atoms being more readily able to collide, leading to a higher number of collisions per second.

Question 18

Why does the reaction rate change with the concentration of the reactant?

Answer 18

The increase in concentration causes the number of collisions between reacting species per second to increase, thus increasing the reaction rate.