Thermal Decomposition Reactions

Question 0

What do metal carbonates break down into?

Answer 0

They decompose into: metal oxide ➕carbon dioxide gas

Eg: metal carbonate

Question 1

What is a thermal decomposition reaction?

Answer 1

Reactions that involve the use of heat to break down a compound into smaller compounds

Question 2

What do metal hydrogen carbonates break into?

Answer 2

Into a metal carbonate ➕ carbon dioxide gas ➕ water

Eg: metal hydrogen carbonate

Question 3

Example of a thermal decomposition reaction

Answer 3

[reaction] this is a thermal decomposition reaction
[observation] when the (colour) (metal carbonate or hydrogen carbonate) is heated strongly it turns (colour) when it is cooled again it turns back into a (colour) solid. There is a gas given off which is seen as bubbles through the limewater which turns the lime water milky white
[word and balance formulae equations]
[chemistry and links] the (colour) (compound) solid undergoes thermal decomposition to form solid (Metal oxide/carbonate) which is (color) when cool and (colour) when hot and colourless CO2 gas (and water). The CO2 gas produces bubbles in the limewater and reacts with the limewater to produce a white precipitate CaCO3 which is seen as milky white
CO2 ➕Ca(OH)2

Question 4

Hints of thermal decomposition reactions in a formulae

Answer 4

One into two compounds