1.9-10: Types of Chemical Reactions

Question 1

Evidence of Chemical Change

Answer 1

• Colour change (not always)
• Irreversible
• Change in odour
• Temperature change
• Production of a solid → precipitate
• Production of a gas → fizzing, bubbling

Question 2

Four types of chemical reactions

Answer 2

• Synthesis
• Decomposition
• Single displacement
• Double displacement

Question 3

Synthesis

Answer 3

one or more reactants produce one new product
A + B = AB

Question 4

Decomposition

Answer 4

one compound splits apart into two or more products
AB –> A + B

Question 5

Single Displacement

Answer 5

• one element in a compound is replaced
• occurs according to activity series of metals
  AB + C –> AC + B

Question 6

What is the Activity Series of Metals?

Answer 6

• list of elements organized according to chemical reactivity
• more reactive replaces other
  (metal –> metal)
  (nonmetal –> nonmetal)

Question 7

Double Displacement

Answer 7

• cations or anions of 2 compounds switch
• occurs between solutions
• produces precipitate
  AB + CD –> AD + CB