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chemistry Flashcards

(12 cards)

1
Q

filters contain? to?

A

carbon to remove unpleasant taste

silver to kill bacteria

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2
Q

how do you get pure water?

A

distill it but it requires lots of energy - expensive

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3
Q

what are the different flame tests?

A
lithium - crimson 
sodium - yellow
potassium - lilac 
barium - green 
calcium - red
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4
Q

copper + sodium hydroxide =?

A

blue precipitate

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5
Q

iron 2 +sodium hydroxide =?

A

green precipitate

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6
Q

iron 3 + sodium hydroxide = ?

A

brown precipitate

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7
Q

calcium + magnesium + aluminium + sodium hydroxide = ?

A

white precipitate

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8
Q

how do you test for halide ions ?

A

add dilute nitric acid then sliver nitrite

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9
Q

chloride will form?

A

white precipitate

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10
Q

bromide will form?

A

cream

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11
Q

iodide will form?

A

yellow

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12
Q

how do to test for sulphate ions?

A

add hcl or nitric acid then dilute barium chloride

white precipitate

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