Factor of Reaction Rate

Question 1

Factors that Affect Reaction Rate

Answer 1

• Concentration
• Agitation
• Surface area of reactants
• Catalysts
• Enzymes

Question 2

Concentration

Answer 2

• Concentration is the amount of a substance present in a certain volume of liquid or gas.

Question 3

Agitation

Answer 3

• Agitation (known as stirring) ensure that the reactants are kept in contact.
• It removes the build-up of products around the reactants.

Question 4

Surface Area of Reactants

Answer 4

• Increasing the Surface area of reactants causes them to have a faster reaction and vice versa.

Question 5

Catalysts

Answer 5

• Catalysts are chemicals that speed up chemical reactions but are not used up during the reaction.
• They reduce energy and make it easier to combine.

Question 6

Enzymes

Answer 6

• Enzymes are biological catalysts, which means they naturally speed up chemical reactions in the body.
• They hold chemicals together until they rearrange to form products.

Question 7

Collision Theory

Answer 7

• The Collision Theory states that for a chemical reaction to happen, the reacting particles must collide with one another.

Question 8

Predict reactivity

Answer 8

• Period – Reactivity decreases as you go from left to right.
• Group – Reactivity decreases as you go down the group.

Question 9

Periodic Table Groups and Properties

Answer 9

• Group 1: alkali metals.
• Group 2: alkaline earth metals.
• Group 3: scandium family.
• Group 4: titanium family.
• Group 5: vanadium family.
• Group 6: chromium family.
• Group 7: manganese family.
• Group 8: iron family.