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chemical reactions

chmical or physical changes and testing gases

QuestionAnswer
frost forming physical - reversible, still water
burning toast chmical - change colour, change taste, not reversible
dissolving instant coffee physical - still coffee, is reversible
iron nail rusting chemical - changing colour, new material, not reversible
hydrogen light it - pop
carbon dioxide add lime water- milky
Chlorides are made when hydrochloric acid is used.
Sulphates are made when sulphuric acid is used.
Nitrates are made when nitric acid is used.
Created by: Stephanie.oliver