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Thermal Decomposition Reactions Flashcards

(5 cards)

0
Q

What do metal carbonates break down into?

A

They decompose into: metal oxide ➕carbon dioxide gas

Eg: metal carbonate

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1
Q

What is a thermal decomposition reaction?

A

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

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2
Q

What do metal hydrogen carbonates break into?

A

Into a metal carbonate ➕ carbon dioxide gas ➕ water

Eg: metal hydrogen carbonate

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3
Q

Example of a thermal decomposition reaction

A

[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

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4
Q

Hints of thermal decomposition reactions in a formulae

A

One into two compounds

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