Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

A-LEVEL CHEM > RP4 - TESTING FOR IONS > Flashcards

RP4 - TESTING FOR IONS Flashcards

1
Q

What are the tests for group 2 ions?

A
  • add NaOH then add more NaOH
    or
  • add H2SO4 then add more H2SO4
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the +ve result for Mg^2+ with NaOH and with excess NaOH?

A
  • NaOH: slight white precipitate
  • excess NaOH: white precipitate
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the +ve result for Ca^2+ with NaOH and with excess NaOH?

A
  • NaOH: slight white precipitate
  • excess NaOH: slight white precipitate
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the +ve result for Sr^2+ with NaOH and with excess NaOH?

A
  • NaOH: slight white precipitate
  • excess NaOH: slight white precipitate
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the result for Ba^2+ with NaOH and with excess NaOH?

A
  • NaOH: no change (colourless solution)
  • excess NaOH: no change (colourless solution)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the +ve result for Mg^2+ with H2SO4 and with excess H2SO4?

A
  • H2SO4: slight white precipitate
  • excess H2SO4: colourless solution
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the +ve result for Ca^2+ with H2SO4 and with excess H2SO4?

A
  • H2SO4: slight white precipitate
  • excess H2SO4: slight white precipitate
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the +ve result for Sr^2+ with H2SO4 and with excess H2SO4?

A
  • H2SO4: white precipitate
  • excess H2SO4: white precipitate
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the +ve result for Ba^2+ with H2SO4 and with excess H2SO4?

A
  • H2SO4: white precipitate
  • excess H2SO4: white precipitate
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the test for ammonium (NH4^+) ions?

A
  • add NaOH
  • warm gently
  • hold damp red litmus paper in the mouth of the test tube
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the +ve result for ammonium (NH4^+) ions?

A

damp red litmus paper turns blue

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

What is the test for OH^- ions?

A

damp red litmus paper

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

What is the +ve result for OH^- ions?

A

damp red litmus paper turns blue

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

What is the test for CO3^2- ions?

A
  • add HCl
  • bubble gas produced through limewater
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the +ve result for CO3^2- ions?

A

limewater turns cloudy

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

What is the test for SO4^2- ions?

A
  • add HCl
  • add BaCl2
17
Q

What is the +ve result for SO4^2- ions?

A

white precipitate

18
Q

What is the test for halide ions?

A
  • add HNO3
  • add AgNO3
19
Q

What is the +ve result for Cl^- ions?

A

white precipitate

20
Q

What is the +ve result for Br^- ions?

A

cream precipitate

21
Q

What is the +ve result for I^- ions?

A

yellow precipitate

22
Q

What happens when you add dilute NH3 to a positive result of Cl^- ions?

A

solution goes colourless

23
Q

What happens when you add dilute NH3 to a positive result of Br^- ions?

A

no reaction (cream precipitate remains)

24
Q

What happens when you add conc. NH3 to a positive result of Br^- ions?

A

solution goes colourless

25
Q

What happens when you add dilute NH3 to a positive result of I^- ions?

A

no reaction (yellow precipitate remains)

26
Q

What happens when you add conc. NH3 to a positive result of I^- ions?

A

no reaction (yellow precipitate remains)

A-LEVEL CHEM (20 decks)

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