Chapter 18: Chemical Tests Flashcards

1
Q

Why must litmus paper be dampened before use with ammonia gas?

A

because ammonia gas reacts with the water on the litmus paper to form ammonium hydroxide and litmus paper turns blue in the presence of hydroxide ions.

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

What is the example equation for copper (sulphate) and sodium hydroxide reacting?

A

Copper (sulphate) + sodium hydroxide-> copper hydroxide + sodium (sulphate)

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

What is the example equation for ammonium (chloride) + sodium hydroxide reacting?

A

Ammonium (chloride) + sodium hydroxide -> sodium chloride + ammonia + water

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

What is the example equation for zinc carbonate and nitric acid reacting?

A

Zinc carbonate + nitric acid -> zinc nitrate + carbon dioxide + water

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

What is the example equation for barium chloride and sodium sulphate reacting?

A

Barium chloride + sodium sulphate -> sodium chloride + barium sulphate

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

What is the example equation for silver nitrate and sodium bromide reacting?

A

Silver nitrate + sodium bromide -> sodium nitrate + silver bromide

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

What happens when carbon dioxide and limewater react?

A

a white precipitate of calcium carbonate forms

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