2495686
Pregunta 1
Pregunta
What colour are aqueous Fe²⁺ ions?
[Fe(H₂O)₆]²⁺
Respuesta
-
Pale Green
-
Green
-
Blue
-
Brown
Pregunta 2
Pregunta
What colour are aqueous Fe²+ ions in a small amount of OH-
[Fe(H₂O)₆]²⁺ + 2OH- → Fe(H₂O)₄(OH)₂ (s) + 2H₂O
Respuesta
-
Green glatinous precipitate
-
Green precipitate
-
Brown gelatinous precipitate
-
Yellow
Pregunta 3
Pregunta
What colour are aqueous Fe²+ ions in a small amount of NH₃
[Fe(H₂O)₆]²⁺ + 2NH₃ → Fe(H₂O)₄(OH)₂ (s) + 2NH₄⁺
Respuesta
-
Green Gelatinous precipitate
-
Brown Gelatinous Preciptate
-
Brown
-
Blue Gelatinous
Pregunta 4
Pregunta
What colour are aqueous Fe²+ ions when OH- is added in excess
[Fe(H₂O)₆]²⁺ + 2OH- → Fe(H₂O)₄(OH)₂ (s) + 2H₂O
Respuesta
-
Green Gelatinous Precipitate
-
Yellow Gelatinous Precipitae
-
Purple
-
Brown Gelatinous Precipitate
Pregunta 5
Pregunta
What colour are aqueous Fe²+ ions when NH₃ is added in excess
[Fe(H₂O)₆]²⁺ + 2NH₃ → Fe(H₂O)₄(OH)₂ (s) + 2NH₄⁺
Respuesta
-
Green gelationuos precipitate
-
Brown precipitate
-
Blue Gelatinous Precipitate
-
Yellow Precipitate
Pregunta 6
Pregunta
Why does Fe(H₂O)₄(OH)₂ (s) turn brown in air?
Respuesta
-
Oxidised by oxygen in air
-
Fe(H₂O)₃(OH)₃ is formed which is Brown
-
It is reduced by air
-
There are impurities
Pregunta 7
Pregunta
What is formed when Fe²⁺ is added to CO₃²⁻ ? And what colour is it?
Respuesta
-
FeCO₃ Iron Carbonate
-
Green precipitate
-
Green gelatinous precipitate
-
Fe₂(CO₂)₃
Pregunta 8
Pregunta
What colour is aqueous Co²⁺ ? And what is its formula?
Respuesta
-
[Co(H₂O)₆]²⁺
-
Pink
-
Blue
-
Co(H₂O)₄(OH)₂
Pregunta 9
Pregunta
What colour are aqueous Co²+ ions in a small amount of OH-
[Co(H₂O)₆]²⁺ + 2OH- → Co(H₂O)₄(OH)₂ (s) + 2H₂O
Respuesta
-
Blue Precipitate
-
Pink Precipitae
-
Yellow
-
Green
Pregunta 10
Pregunta
What colour are aqueous Co²+ ions in a small amount of NH₃
[Co(H₂O)₆]²⁺ + 2NH₃ → Co(H₂O)₄(OH)₂ (s) + 2NH₄⁺
Respuesta
-
Blue Precipitate
-
Orange
-
Pale Blue Precipitate
-
Blue Gelatinous Precipitate
Pregunta 11
Pregunta
What colour are aqueous Co²+ ions when OH- is added in excess?
[Co(H₂O)₆]²⁺ + 2OH- → Co(H₂O)₄(OH)₂ (s) + 2H₂O
Respuesta
-
Blue Precipitate
-
Yellow Precipitate
-
Green Gelatinous Precipitate
-
Blue gelatinous precipitate
Pregunta 12
Pregunta
What colour are aqueous Co²+ ions when NH₃ is added in excess? What is the formula?
[Co(H₂O)₆]²⁺ + 2NH₃ →
Respuesta
-
Co(H₂O)₄(OH)₂
-
Co(NH₃)₆
-
Pale Yellow
-
Blue
Pregunta 13
Pregunta
Why does [Co(NH₃)₆]²⁺ turn to a brown solution in air?
Respuesta
-
Co²⁺ is oxidied by air to form Co³⁺
-
There are impurities
-
Ligand Exchange takes place
Pregunta 14
Pregunta
What is fromed when Co²+ ions are in the presence of CO₃²⁻ ? And what colour is it?
[Co(H₂O)₆]²⁺ + CO₃²⁻ →
t is formed
[Co(H₂O)₆]²⁺ + OH- → Co(H₂O)₄(OH)₂ (s) + 2H₂O
Respuesta
-
CoCO₃
-
Pink Precipitate
-
Blue precipitate
-
Co(H₂O)₄(CO₃)₂
Pregunta 15
Pregunta
What colour are aqueous Cu²+ ions
[Cu(H₂O)₆]²⁺
Respuesta
-
Blue
-
Pale Blue
-
Orange
-
Green
Pregunta 16
Pregunta
What colour are aqueous Cu²+ ions in a small amount of OH-
[Cu(H₂O)₆]²⁺ + 2OH- → Cu(H₂O)₄(OH)₂ (s) + 2H₂O
Respuesta
-
Deep Blue precipitate
-
Pale Blue Precipitate
-
Green Precipitate
-
Orange precipitate
Pregunta 17
Pregunta
What colour are aqueous Cu²+ ions OH- are added in excess?
[Cu(H₂O)₆]²⁺ + 2OH- → Cu(H₂O)₄(OH)₂ (s) + 2H₂O
Respuesta
-
Pale blue precipitate
-
Green precipitate
-
Dark Blue solution
-
Pale Blue Solution
Pregunta 18
Pregunta
What colour are aqueous Cu²+ ions in a small amount of NH₃
[Cu(H₂O)₆]²⁺ + 2NH₃ → Cu(H₂O)₄(OH)₂ (s) + 2NH₄⁺
Respuesta
-
Pale Blue solution
-
Pale Blue precipitate
-
Colourless Solution
-
Yellow precipitate
Pregunta 19
Pregunta
What colour are aqueous Cu²+ when NH₃ is added in excess
[Cu(H₂O)₆]²⁺ + 4NH₃ → [Cu(NH₃)₄(H₂O)₂]²⁺ + 4H₂O
Respuesta
-
Deep Blue Solution
-
Deep Blue Precipitate
-
Pale Blue precipitate
-
Pale Blue solution
Pregunta 20
Pregunta
What colour are aqueous Cu²+ when in the presence of CO₃²⁻
[Cu(H₂O)₆]²⁺ + 2CO₃²⁻ → CuCO₃ (s) + 6H₂O
Respuesta
-
Blue-Green Solution
-
Blue-Green Precipitate
-
Blue Precipitate
-
Red Precipitate
Pregunta 21
Pregunta
What colour are aqueous Fe³⁺ ?
Respuesta
-
Purple
-
Yellow
-
Green
-
Blue
Pregunta 22
Pregunta
What colour are aqueous Fe³⁺ ions in a small amount of OH-?
[Fe(H₂O)₆]³⁺ + 3OH- → Fe(H₂O)₃(OH)₃ (s) + 3H₂O
Respuesta
-
Brown Precipitate
-
Brown Gelatinous Precipitate
-
Green Gelatinous Precipitate
-
Green Precipitate
Pregunta 23
Pregunta
What colour are aqueous Fe³⁺ ions when OH- is added in excess?
[Fe(H₂O)₆]³⁺ + 3OH- → Fe(H₂O)₃(OH)₃ (s) + 3H₂O
Respuesta
-
Brown Gelatinous Precipitate
-
Brown Solution
-
Yellow Solution
-
Green Gelatinous Precipitate
Pregunta 24
Pregunta
What colour are aqueous Fe³⁺ ions in a small amount of NH₃
[Fe(H₂O)₆]³⁺ + 3NH₃ → Fe(H₂O)₃(OH)₃ (s) + 3NH₄⁺
Respuesta
-
Brown Gelatinous Precipitate
-
Green Solution
-
Blue Gelatinous Precipitate
-
Blue Solution
Pregunta 25
Pregunta
What colour are aqueous Fe³⁺ ions when NH₃ is added in excess?
[Fe(H₂O)₆]³⁺ + 3NH₃ → Fe(H₂O)₃(OH)₃ (s) + 3NH₄⁺
Respuesta
-
Green Gelatinous Precipitate
-
Yellow Gelatinous Precipitate
-
Brown Gelatinous Precipitate
-
Yellow Solution
Pregunta 26
Pregunta
What is observed when aqueous Fe³⁺ ions when in the presence of CO₃²⁻? What is formed?
[Fe(H₂O)₆]³⁺ + 3CO₃²⁻ →
Respuesta
-
Fe(H₂O)₃(OH)₃ + CO₂
-
Brown Gelatinous precipitate Effervesence (Bubbles)
-
Fe(H₂O)₄(OH)₂ + CO₂
-
Green Gelatinous Precipitate Effervesence (Bubbles)
Pregunta 27
Pregunta
What colour are aqueous Al³⁺ ions in a small amount of OH-
[Al(H₂O)₆]³⁺ + 3OH- → Al(H₂O)₃(OH)₃ (s) + 3H₂O
Respuesta
-
Colourless
-
White precipitate
-
Yellow precipitate
-
Pink Solution
Pregunta 28
Pregunta
What colour are aqueous Al³⁺ ions
[Al(H₂O)₆]³⁺
Respuesta
-
Colourless solution
-
White precipitate
-
Red Solution
-
Silver solution
Pregunta 29
Pregunta
What colour are aqueous Al³⁺ ions when OH- is added in excess?
[Al(H₂O)₆]³⁺ + 4OH- → [Al(OH)₄]⁻ (s) + 6H₂O
Respuesta
-
Colourless Solution
-
Red precipitate
-
Red solution
-
White Solution
Pregunta 30
Pregunta
What colour are aqueous Al³⁺ ions in a small amount of NH₃
[Al(H₂O)₆]³⁺ + 3NH₃ → Al(H₂O)₃(OH)₃ (s) + 3NH₄⁺
Respuesta
-
White Precipitate
-
Pale Blue Solution
-
White Solution
-
Orange Precipitate
Pregunta 31
Pregunta
What colour are aqueous Al³⁺ ions when NH₃ is added in excess
[Al(H₂O)₆]³⁺ + 3NH₃ → Al(H₂O)₃(OH)₃ (s) + 3NH₄⁺
Respuesta
-
White solution
-
White Precipitate
-
Pale Blue Solution
-
Blue Precipitate
Pregunta 32
Pregunta
What is observed when Al³⁺ are in the presence of CO₃²⁻ ? What is produced?
[Al(H₂O)₆]³⁺ + CO₃²⁻ → Al(⁻H₂O)₃(OH)₃ (s) + 3H₂O
Respuesta
-
Al(⁻H₂O)₃(OH)₃ (s) + CO₂
-
White Precipitate Effervesence (Bubbles)
-
Al(H₂O)₄(OH)₂ + CO₂
-
Colourless Solution Effervesence
Pregunta 33
Pregunta
What colour are aqueous Cr³⁺ ions?
[Cr(H₂O)₆]³⁺
Respuesta
-
Blue
-
Pink
-
Ruby
-
Yellow
Pregunta 34
Pregunta
What colour are aqueous Cr³⁺ ions in a small amount of OH-
[Cr(H₂O)₆]³⁺ + 3OH- → Cr(H₂O)₃(OH)₃ (s) + 3H₂O
Respuesta
-
Red Precipitate
-
Green Precipitate
-
Blue Precipitate
-
Orange Precipitate
Pregunta 35
Pregunta
What colour are aqueous Cr³⁺ when OH- is added in excess?
[Cr(H₂O)₆]³⁺ + 6OH- → [Cr(OH)₆]³⁻ (s) + 6H₂O
Respuesta
-
Green Precipitate
-
Green Solution
-
Red Solution
-
Blue Precipitate
Pregunta 36
Pregunta
What colour are aqueous Cr³⁺ ions in a small amount of NH₃
[Cr(H₂O)₆]³⁺ + 3NH₃ → Cr(H₂O)₃(OH)₃ (s) + 3NH₄⁺
Respuesta
-
Green Precipitate
-
Green Solution
-
Brown Precipitate
-
Red Solution
Pregunta 37
Pregunta
What colour are aqueous Cr³⁺ ions when NH₃ is added in excess?
[Cr(H₂O)₆]³⁺ + 3NH₃ → [Cr(NH₃)₆]³⁺ (s) + 6H₂O
Respuesta
-
Green Solution
-
Purple Solution
-
Purple Precipitate
-
Green Precipitate
Pregunta 38
Pregunta
What is observed when Cr³⁺ ions are in the presence of CO₃²⁻ ? What is formed?
[Cr(H₂O)₆]³⁺ + 3CO₃²⁻ →
Respuesta
-
Cr(H₂O)₃(OH)₃ (s) + CO₂
-
Green Precipitate Effervesence (Bubbles)
-
Cr(H₂O)₄(OH)₂ (s) + CO₂
-
Green Solution Effervesence (Bubbles)
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