Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

chemistry (alevels) > Inorganic Practical > Flashcards

Inorganic Practical Flashcards

1
Q

What reagents are used to test for sulfate ions

A

BaCl2
HCl

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

What is produced if sulfate is present

A

White precipitate

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

What is the simplest ionic equation for the test of sulfate

A

Ba2+ (aq) +SO42- —> BaSO4

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

Why is hydrochloric acid added to test for sulfate ions

A

Is used to react with the carbonate impurities
Prevent formation of barium carbonate

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

What reagents are used to identify halides

A

Nitric acid
Silver nitrate

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

What is produced if chloride is present

A

White precipitate

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

What is the ionic equation for when chloride is present

A

Ag+ +Cl- —> AgCl

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

What forms when bromide is present

A

Cream precipitate

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

What is the ionic equation for when bromide is present

A

Ag+ + Br- —> AgBr

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

What is the colour of precipitate when iodide is present

A

Yellow precipitate

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

What is the ionic equation for presence of iodide

A

Ag+ +I- —> AgI

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

What is the role of nitric acid when identifying halides

A

Reacts with any carbonates to prevent the formation of Ag2CO3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is a reducing agent

A

Something that donates electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the trend for reducing ability in group 7

A

Reducing power increases down group 7

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Why does reducing ability increase as you go down group 7

A

The ions get bigger it is easier for outer electrons to be given away
As attraction with nucleus gets smaller

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the reaction when fluoride ions react with sulfuric acid

A

NaF +H2SO4 —> NaSO4 + HF

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q
A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What are silver halides treated with

A

Ammonia solution

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Why is ammonia solution added

A

To help differentiate between silver halide precipitates

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Describe the reaction between silver chloride and ammonia

A

AgCl + 2 NH3 (aq) —> [Ag(NH3)2]+ + Cl-

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What is silver bromide treated with

A

Concentrated ammonia

22
Q

Describe the reaction between silver bromide and concentrated ammonia

A

AgBr + 2NH3 —> [Ag(NH3)2]2+ + Br-

23
Q

Does silver iodide react with ammonia

24
Q

How do you test for carbonate ions

A

Add dilute acid and observe effervescence

Bubble gas through limewater to test for CO2 -will turn limewater cloudy

2HCl + Na2CO3 —> 2NaCl + H2O + CO2

25
Describe the test for hydroxides
Hydroxide ions will turn red litmus paper blue
26
What reagents are used to test for ammonium ions
Ammonium chloride Sodium hydroxide
27
Describe test for ammonium ions
1.Add ammonium chloride to test tube 2.Add sodium hydroxide solution 3.Warm mixture 4.Test fume release by holding red litmus paper in the mouth of test tube
28
What is the trend in solubility as you go down group 2
More soluble as you go down
29
What is the equation for the formation of Mg(OH) 2
Mg2+ + 2 OH- —> Mg(OH)2 (s)
30
What colour precipitate is magnesium hydroxide
White precipitate
31
What is the equation for calcium hydroxide
Ca2+ (aq) + 2OH- —> Ca(OH)2 (s)
32
What colour precipitate is calcium hydroxide
White precipitate
33
What metals react to form sulfates in group 2
Strontium And barium
34
What group 2 metals form hydroxide
Calcium and magnesium
35
What is used to test halides reducing ability
Sulfuric acid
36
What two ions are not strong enough reducing agents
F- and Cl-
37
What is the reaction when Soidum chloride reacts with sulfuric acid
NaCl(s) + H2SO4 —-> NaHSO4 + HCl
38
What can you observe when sodium chloride reacts with sulfuric acid
White fumes
39
Once HBr is produced what happens when that reacts with sulfuric acid
2HBr + H2SO4 —> Br (g) + SO2 + 2H2O
40
What is observed when H2SO4 is reduced by Br ions
White steamy fumes produced Orange fumes of bromine are also produced
41
What is the role of H2SO4
Plays the role of the acid in the first step when producing HBr Then acts as an oxidising agent in the second step
42
What is the reaction when Hi reacts with H2SO4
2HI + H2SO4 —-> I2 + SO2 + 2H2O 6HI + H2SO4 —-> 3 I2 + S + 4H2O 8 HI + H2SO4 —-> 4I2 + H2S +4H2O
43
44
What is observed in the reduction of sulfuric acid with HI
White steamy fumes Black solid and purple fumes of iodine are evolved A colourless acidic gas (SO2) A yellow solid of sulfur H2S bad egg smell
45
How would insoluble salt be removed
By filtration And washed with distilled water
46
47
Why are insoluble salts washed with distilled water
To remove soluble impurities
48
49
50
For testing for aqueous transition metals what reagents are used
Sodium hydroxide Ammonia solution Sodium carbonate
51

chemistry (alevels) (23 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions