chemistry Flashcards
(12 cards)
1
Q
filters contain? to?
A
carbon to remove unpleasant taste
silver to kill bacteria
2
Q
how do you get pure water?
A
distill it but it requires lots of energy - expensive
3
Q
what are the different flame tests?
A
lithium - crimson sodium - yellow potassium - lilac barium - green calcium - red
4
Q
copper + sodium hydroxide =?
A
blue precipitate
5
Q
iron 2 +sodium hydroxide =?
A
green precipitate
6
Q
iron 3 + sodium hydroxide = ?
A
brown precipitate
7
Q
calcium + magnesium + aluminium + sodium hydroxide = ?
A
white precipitate
8
Q
how do you test for halide ions ?
A
add dilute nitric acid then sliver nitrite
9
Q
chloride will form?
A
white precipitate
10
Q
bromide will form?
A
cream
11
Q
iodide will form?
A
yellow
12
Q
how do to test for sulphate ions?
A
add hcl or nitric acid then dilute barium chloride
white precipitate
