chemistry Flashcards
(12 cards)
filters contain? to?
carbon to remove unpleasant taste
silver to kill bacteria
how do you get pure water?
distill it but it requires lots of energy - expensive
what are the different flame tests?
lithium - crimson sodium - yellow potassium - lilac barium - green calcium - red
copper + sodium hydroxide =?
blue precipitate
iron 2 +sodium hydroxide =?
green precipitate
iron 3 + sodium hydroxide = ?
brown precipitate
calcium + magnesium + aluminium + sodium hydroxide = ?
white precipitate
how do you test for halide ions ?
add dilute nitric acid then sliver nitrite
chloride will form?
white precipitate
bromide will form?
cream
iodide will form?
yellow
how do to test for sulphate ions?
add hcl or nitric acid then dilute barium chloride
white precipitate