gcse core chemistry exam tip; thermal decomposition means ‘breaking down using heat’ key words;...

GCSE Core Chemistry

Exam tip; Thermal Decomposition means ‘breaking down using heat’

Key words; formula, quicklime, thermal decomposition, word equation

GCSE Core Chemistry


Learning Objectives: By the end of the lesson I can: • The formula of a compound shows the number The formula of a compound shows the number and type of atoms that are joined together to and type of atoms that are joined together to make the compound.make the compound.

• • Calcium carbonate can be decomposed by Calcium carbonate can be decomposed by heating (thermal decomposition) to make heating (thermal decomposition) to make quicklime (calcium oxide) and carbon dioxide.quicklime (calcium oxide) and carbon dioxide.

• • Limestone (CaCOLimestone (CaCO33), and its products have many ), and its products have many uses, including slaked lime, mortar, cement, uses, including slaked lime, mortar, cement, concrete and glass.concrete and glass.

• • Consider and evaluate the environmental, social Consider and evaluate the environmental, social and economic effects of exploiting limestone and and economic effects of exploiting limestone and producing building materials from it.producing building materials from it.

GCSE Core Chemistry


What do the following substances have in What do the following substances have in common?common?

Limestone and Chalk Limestone and Chalk are sedimentary rocksare sedimentary rocks

Marble is aMarble is aMetamorphicMetamorphic

rockrock

Calcium carbonate is aCalcium carbonate is apure compound!pure compound!it is not a rockit is not a rock

and henceand henceit is notit is not

a mixture!a mixture!

GCSE Core Chemistry


Classify the following substances into groups Classify the following substances into groups & explain why you have& explain why you have

GCSE Core Chemistry


Task: Use your text to create an A-mapTask: Use your text to create an A-map

1. Add keywords2. Add pictures3. Complete sentences using keywords to connect the map

GCSE Core Chemistry


Peer Learning

Swap your map with another pair on your table and add in ANOTHER 4ANOTHER 4thth COLOUR COLOUR any additional information to further improve their map.

GCSE Core Chemistry


Summary 1

We quarry large amounts of limestone rock because it has many uses. Blocks of limestone can be used for building and it is used to make;

• Quicklime

• Cement

• glass

GCSE Core Chemistry


Summary 2

Limestone is made mainly of calcium carbonate

What is the formula?What is the formula?

When heated strongly in large lime kilns, calcium carbonate decomposes to make quicklime (calcium oxide) and carbon dioxide.

What is the formula?What is the formula?

We can present the reaction as a word equation

What is the word equation?What is the word equation?

gcse core chemistry exam tip; thermal decomposition means ‘breaking down using heat’ key words;...

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