Topic 4 - Gases in Reactions Flashcards
what happens when an element burns in air?
it reacts with oxygen to form an oxide
what happens when magnesium is burnt in air?
magnesium burns with a bright white flame forming a white power of magnesium oxide
what is the symbol reaction of magnesium burning in air?
2Mg + O₂ = 2MgO
is magnesium oxide acidic?
its slightly alkaline
what happens when hydrogen is burnt in air?
it burns easily with a faint blue flame
what is the symbol reaction for hydrogen burning in air?
2H₂ + O₂ = 2H₂O
what happens when sulfur is burnt in air?
it burns with a pale blue flame producing sulfur dioxide
what is the symbol reaction for sulfur burning in air?
S + O₂ = SO₂
is sulfur dioxide acidic?
yes
what products do you get when you heat a metal carbonate?
you get carbon dioxide and a metal oxide
what is heating a metal carbonate an example of?
thermal decomposition
what is thermal decomposition?
when a substance breaks down into simpler substances when heated
what does copper (II) carbonate decompose into when heated?
carbon dioxide and copper(II) oxide
what is the symbol equation for the thermal decomposition of copper(II) carbonate?
CuCO₃ = CuO + CO₂
