C4: Chemical Changes

Question 1

Group 1 metals’ reactions(2):

Answer 1

Water:
Reactions get more vigorous as you go down the group

Acid:
Reactions get more vigorous as you go down the group

Question 2

Group 2 metals’ reactions(2):

Answer 2

Water:
DO NOT react with water

Acid: observable reactions include fizzing and temperature increases

Question 3

Zinc, iron, and copper reactions(2):

Answer 3

Water:
DO NOT react with water

Acid:
ZINC AND IRON REACT SLOWLY WITH THE ACID. Copper DOES NOT react with the acid

Question 4

Reactivity series

Answer 4

Potassium               Most reactive 
Sodium                               ^
Calcium                              
Lithium                               
Magnesium                        
Aluminum 
Carbon
Zinc
Iron
Lead
Hydrogen 
Copper  
Silver                                 V
Gold                       Least reactive

Question 5

Oxidation and reduction:

Answer 5

Oxidation
 Is
 Loss of electrons 
 Reduction
  Is 
 Gain

Question 6

Define displacement

Answer 6

A more reactive metal can displace a less reactive metal from a compound

Question 7

Carbon and hydrogen(2):

Answer 7

• they are non metals but are still included in the reactivity series
• they can be used to extract some metals from their ores depending on their reactivity

Question 8

Metals in the reactivity series(3):

Answer 8

• metals form positive ions when they react
• the reactivity of a metal is related to its tendency to form positive ions
• the reactivity series arranges metals in order of their reactivity (tendency to form positive ions)

Question 9

Reactions with acids and metals;

Answer 9

Acids react with some metals to produce salts and hydrogen

Question 10

Identifying reactions:

Answer 10

MASH:
Metal + Acid= Salt + Water

CAWCS:
(Metal)Carbonate + Acid= Water + CO2 + Salt

 BAWS:
 Base + Acid = Water + Salt
 (oxide
    or 
  Hydroxide)

Question 11

What acids make what types of salts?

Answer 11

• Hydrochloride Acid= Chloride
• Sulfuric Acid= Sulfate
• Nitric Acid= Nitrate

Question 12

What type of reaction is between a metal and an acid?(3)

Answer 12

Reactions between metals and acids are redox reactions as the metal donates electrons to the hydrogen ions. This displaced hydrogen as a gas while the metal ions are left in the solution