Reactivity

Reactivity

1. ​Explain the reaction of metals with different types of matters

2. Discuss the reactivity of metals

3. Understand that metals have different levels of reactivity

4. Understand more reactive metals can displace less reactive ones from solutions of salts.

How metal reacts with

• oxygen

• water

• acid

Reaction with oxygen

• Oxidation process (gain oxygen)

  •Burning

  •Rusting

• Different levels of reactivity

• Metal oxide is formed

Reaction with water

• Group 1 react vigorously with water; more vigorously down the group

• Some metals will react with hot water/steam but not with cold water

• produce metal hydroxide or metal oxide AND hydrogen gas

Reaction with dilute acid

• dilute acid commonly used: hydrochloric acid and sulfuric acid

• produce salt and hydrogen gas

• different metals have different levels of reactivity in dilute acid

textbook page 87

​more reactive metals can displace less reactive ones

Multiple Choice

When potassium reacts with sulphuric acid, what is the name of the salt produced?

• Potassium Sulphide

• Potassium Sulphur

• Potassium Sulphuric

• Potassium Sulphate

Multiple Choice

When sodium reacts with hydrochloric acid, what is the name of the salt formed?

• Sodium Hydride
• Sodium Chloride
• Sodium Hydrochloric
• Sodium Chlorine

Multiple Choice

When metal reacts with liquid water the products are...

• metal hydroxide and oxygen gas
• metal hydroxide and hydrogen gas
• metal oxide and oxygen gas
• metal oxide and hydrogen gas

Multiple Choice

Which one of the following metals reacts most vigorously with cold water?

• Sodium
• Magnesium
• Copper
• Zinc

Multiple Choice

When a metal reacts with oxygen gas, the product is ...

• metal hydroxide
• metal oxide
• metal oxide and oxygen
• metal hydroxide and hydrogen gas

Multiple Choice

Lithium chloride + Iron → ?

• Lithium chloride + Iron (No change)

• Iron chloride + Lithium

• Lithium oxide + hydrogen

Multiple Choice

Magnesium chloride + Sodium → ?

• Sodium chloride + Magnesium

• Magnesium chloride + Sodium (No change)

• Sodium magnesium + Chlorine

Multiple Choice

What does displacement mean?

• A chemical reaction where a less reactive metal takes the place of a more reactive metal in a compound.

• A chemical reaction where a more reactive metal takes the place of a less reactive metal in a compound.

• A more reactive metal is removed from a compound.

Multiple Choice

Choose the least reactive metal

• calcium

• magnesium

• iron

• copper

Multiple Choice

Which metal is more reactive than calcium?

• magnesium

• potassium

• silver

• aluminum

Rates of reaction​

1. Understand how to measure the rate of reaction

2. Discuss the changes in the rate of reaction

3. Discuss the factors affect rates of reaction

4. ​Explain the function of catalyst in every reaction​

​OR

amount

of

reactant

used

e.g

mass of

solid

​Factors affecting rates of reaction

• ​Temperature

• ​Concentration

• ​Surface area

• ​Catalyst

​Function of catalyst

Multiple Choice

What is the rate of reaction?

• How fast a reaction is 

• How big a reaction is

• How loud a reaction is

• How much gas a reaction produces

Multiple Select

Which factors affect the rate of a reaction?

• temperature

• concentration

• size

• pressure

• catalyst

Multiple Choice

Increase in temperature causes the particles to

• slow down

• move faster

• stay apart from each other

• move in the correct order

Multiple Choice

Why does a higher concentration increase the rate of reaction?

• it increases the amount of reactants

• it lowers the activation energy

• it increases the energy of reactant particles

• it increases the frequency of collision

Multiple Choice

Grinding an effervescent tablet into powder increases the rate of reaction due to increase of

• concentration

• total surface area

• temperature

• size

Multiple Choice

Which of the following is the meaning of activation energy?

• The maximum energy that the particles need to produce effective collision

• The amount of energy used by the particles during a collision

• The minimum amount of energy that particles must have in order to react

• The amount of kinetic energy of molecules during a collision