Further analysis and quantitive chemistry Flashcards
Flame tests can help identify…
…positive ions.
Lithium flame colour?
Crimson.
Sodium flame colour?
Yellow.
Potassium flame colour?
Lilac.
Calcium flame colour?
Red.
Barium flame colour?
Green.
What ions form a white precipitate in sodium hydroxide solution?
Aluminium, calcium and magnesium.
How can we distinguish aluminium, calcium and magnesiums ions?
The precipitate formed between aluminium and sodium hydroxide dissolves in excess sodium hydroxide solution. Calcium ions burn red in a flame.
Copper (II) forms what colour precipitate with sodium hydroxide solution?
Blue.
Iron (II) forms what colour precipitate with sodium hydroxide solution?
Green.
Iron (III) forms what colour precipitate with sodium hydroxide solution?
Brown.
Carbonates react with what to form carbon dioxide?
Dilute acids.
Halide ions produce precipitates with what?
Silver nitrate in the presence of nitric acid.
Silver chloride is what colour?
White.
Silver bromide is what colour?
Cream.