Reactions revision part 2!

Reactions revision part 2!

Starter:

Use the information in the orange box to complete the equations below

Sulfuric acid + calcium -->

Nitric acid + iron carbonate -->

Hydrochloric acid + lead oxide -->

Answers to starter

Sulfuric acid + calcium --> calcium sulfate + hydrogen

Nitric acid + iron carbonate --> iron nitrate + water + carbon dioxide

Hydrochloric acid + lead oxide --> lead chloride + water

Multiple Choice

What does this image mean?

• Harmful

• Toxic

• Corrosive

• Health hazard

Multiple Choice

What does this image mean?

• Harmful

• Harmful to the environment

• Corrosive

• Flammable

Multiple Choice

What does this image mean?

• Harmful/irritant

• Harmful to the environment

• Corrosive

• Flammable

Multiple Choice

What does this image mean?

• Harmful

• Harmful to the environment

• Corrosive

• Flammable

Multiple Choice

What does this image mean?

• Harmful

• Health hazard

• Corrosive

• Toxic

Multiple Choice

What does this image mean?

• Harmful

• Health hazard

• Corrosive

• Toxic

Metals and oxygens

When metals react with oxygen, metal oxides are formed.

This is an oxidation reaction.

Metal + oxygen --> metal oxide

E.g. zinc + oxygen --> zinc oxide

Metal oxides are usually solids and bases.

Multiple Choice

Potassium + oxygen -->

• Potassium chloride

• Pottasium nitrate

• Potassium oxide

• Potassium sulfate

Non metals and oxygens

When non-metals react with oxygen, oxides are also formed.

This is an oxidation reaction.

E.g. sulphur + oxygen --> sulphur dioxide

Non-metal oxides are usually gases and acidic.

Multiple Choice

Carbon + oxygen -->

• Carbon chloride

• Carbon dioxide

• Carbon nitrate

• Carbon sulfate

Metals and water

WRITE THIS DOWN!

Metals + water --> metal hydroxide + hydrogen

Metal hydroxides are bases

E.g. sodium + water --> sodium hydroxide + hydrogen

Test for hydrogen

We test for hydrogen gas by putting a lit splint in the gas.

You will hear a squeaky pop from the lit splint if hydrogen gas is present.

Multiple Choice

Potassium + water -->

• Potassium hydroxide + water

• Potassium hydroxide + hydrogen

• Potassium hydroxide + salt

• Potassium hydroxide + oxygen

Properties of metals vs non metals

Metals are

- shiny

- Good conductors

- They have a high melting point

- Dense

- Malleable (they can bend)

- sonorous (make a sound when hit)

- solid at room temperature

Properties of metals vs non metals

Non metals are

- dull

- poor conductors

- brittle (they cannot bend)

- not sonorous (don't make a sound when hit)

- solid liquid or gas at room temperature

Multiple Select

Which of the properties are properties of METALS

• shiny

• gas at room temperature

• cannot conduct electricity

• sonourous (makes a sound when you hit it)

• malleable (can be bent into different shapes)

Multiple Choice

A CONCENTRATED acid

• has lots of H+ particles

• doesn't have lots of H+ particles

Open Ended

A farmer has a field and they want to test its pH. Name something they can use to test pH.

Multiple Choice

What is 2500J in kJ?

• 25kJ

• 0.25kJ

• 2.5kJ

• 250kJ

Reactivity

Some metals are more reactive than others

E.g. gold is unreactive and we can wear it as jewellery

e.g. potassium is very reactive and it has to be stored in oil, to prevent it from reacting with oxygen in the air

More reactive metals react more VIGOROUSLY

Vigorous reactions

Vigorous reactions might happen

- quickly

- with fire or sparks

- with lots of fizzing

- with a quick temperature or colour change

Multiple Choice

What does vigorous mean?

• Slow, lazy

• Energetic, violent

Multiple Choice

If calcium is more reactive than copper, which would give more vigorous reactions?

• Calcium

• Copper

Multiple Choice

If sodium is more reactive than gold, which would fizz the least with acid?

• sodium

• gold

Multiple Choice

There is a faster temperature change when lead reacts with acid, compared to when silver reacts with acid. Which is more reactive?

• lead

• silver

Displacement reactions

More reactive elements will displace (push out) less reactive elements from a compound.

E.g. zinc + iron sulfate --> zinc sulfate + iron

The zinc has displaced the iron because it is more reactive than iron.

Multiple Choice

Sodium is more reactive than gold.

Can sodium displace gold from a compound?

• Yes

• No

Multiple Choice

Sodium is more reactive than gold.

Can gold displace sodium from a compound?

• Yes

• No

Multiple Choice

Aluminium is more reactive than iron.

Will a displacement reaction happen if aluminium and iron oxide react?

• Yes

• No

Multiple Choice

Magnesium is more reactive than copper.

Will a displacement reaction happen if magnesium and copper oxide react?

• Yes

• No

Multiple Choice

Zinc is more reactive than copper.

Will a displacement reaction happen if copper and zinc oxide react?

• Yes

• No