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Year 12 and 13 chemistry > Aqua Metal Ions Reactions > Flashcards

Aqua Metal Ions Reactions Flashcards

1
Q

What is observed when NaOH is added to aqueous Fe²⁺ ions?

A

Green solution → Green precipitate → Brown precipitate on standing in air

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2
Q

What is observed when NH₃ is added to aqueous Fe²⁺ ions?

A

Green solution → Green precipitate → Brown precipitate on standing in air

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3
Q

What is observed when Na₂CO₃ is added to aqueous Fe²⁺ ions?

A

Green solution → Green precipitate

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4
Q

What is observed when NaOH is added to aqueous Cu²⁺ ions?

A

Blue solution → Blue precipitate

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5
Q

What is observed when NH₃ is added to aqueous Cu²⁺ ions?

A

Blue solution → Blue precipitate → Deep blue solution in excess

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6
Q

What is observed when Na₂CO₃ is added to aqueous Cu²⁺ ions?

A

Blue solution → Blue precipitate

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7
Q

What is observed when NaOH is added to aqueous Fe³⁺ ions?

A

Orange solution → Brown precipitate

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8
Q

What is observed when NH₃ is added to aqueous Fe³⁺ ions?

A

Orange solution → Brown precipitate

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9
Q

What is observed when Na₂CO₃ is added to aqueous Fe³⁺ ions?

A

Orange solution → Brown precipitate + effervescence

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10
Q

What is observed when NaOH is added to aqueous Al³⁺ ions?

A

Colourless solution → White precipitate → Re-dissolves in excess

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11
Q

What is observed when NH₃ is added to aqueous Al³⁺ ions?

A

Colourless solution → White precipitate

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12
Q

What is observed when Na₂CO₃ is added to aqueous Al³⁺ ions?

A

Colourless solution → White precipitate + effervescence

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13
Q

Give the equation for the reaction of a 2+ aqua ion with Na₂CO₃

A

[M(H₂O)₆]²⁺ + CO₃²⁻ → MCO₃(s) + 6H₂O

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14
Q

Give the equation for the reaction of a 3+ aqua ion with Na₂CO₃

A

2[M(H₂O)₆]³⁺ + 3CO₃²⁻ → M(OH)₃(H₂O)₃(s) + 3CO₂ + 3H₂O

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15
Q

Give the equation for the reaction of aqueous Cu²⁺ with excess NH₃

A

[Cu(H₂O)₆]²⁺ + 4NH₃ → [Cu(H₂O)₂(NH₃)₄]²⁺ + 4H₂O
Or
Cu(OH)₂(H₂O)₄ + 4NH₃ → [Cu(H₂O)₂(NH₃)₄]²⁺ + 2OH⁻

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16
Q

Give the equation for the reaction of aqueous Al³⁺ with excess NaOH

A

[Al(H₂O)₆]³⁺ +4OH⁻ → [Al(H₂O)₂(OH)₄]⁻ + 4H₂O
Or
Al(OH)₃(H₂O)₃ + OH⁻ → [Al(H₂O)₂(OH)₄]⁻ + H₂O

Year 12 and 13 chemistry (10 decks)

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