chemistry Flashcards

1
Q

filters contain? to?

A

carbon to remove unpleasant taste

silver to kill bacteria

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

how do you get pure water?

A

distill it but it requires lots of energy - expensive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what are the different flame tests?

A
lithium - crimson 
sodium - yellow
potassium - lilac 
barium - green 
calcium - red
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

copper + sodium hydroxide =?

A

blue precipitate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

iron 2 +sodium hydroxide =?

A

green precipitate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

iron 3 + sodium hydroxide = ?

A

brown precipitate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

calcium + magnesium + aluminium + sodium hydroxide = ?

A

white precipitate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

how do you test for halide ions ?

A

add dilute nitric acid then sliver nitrite

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

chloride will form?

A

white precipitate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

bromide will form?

A

cream

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

iodide will form?

A

yellow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

how do to test for sulphate ions?

A

add hcl or nitric acid then dilute barium chloride

white precipitate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly