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Chemistry > QA - Test for Cations > Flashcards

QA - Test for Cations Flashcards

1
Q

Ca2+ + NaOH (aq)

A

Dropwise: White ppt formed
Excess: White ppt insoluble in excess

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2
Q

Zn2+ + NaOH (aq)

A

Dropwise: White ppt formed
Excess: White ppt soluble in excess, giving a colourless solution

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3
Q

Al3+ + NaOH (aq)

A

Dropwise: White ppt formed
Excess: White ppt soluble in excess), giving a colourless solution.

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4
Q

Pb2+ + NaOH (aq)

A

Dropwise: White ppt formed
Excess: White ppt soluble in excess, giving a colourless solution.

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5
Q

Fe2+ + NaOH (aq)

A

Dropwise: Green ppt
Excess: Green ppt insoluble in excess

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6
Q

Fe3+ + NaOH (aq)

A

Dropwise: Reddish brown ppt formed
Excess: Reddish brown ppt insoluble in excess

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7
Q

Cu2+ + NaOH (aq)

A

Dropwise: Blue ppt of formed
Excess: Blue ppt insoluble in excess

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8
Q

NH4+ + NaOH (aq)

A

Dropwise: No ppt formed
NH3 evolved upon heating.

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9
Q

Ca2+ + NH3 (aq)

A

Dropwise: No ppt formed

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10
Q

Zn2+ + NH3 (aq)

A

Dropwise: White ppt formed
Excess: White ppt soluble in excess , giving a colourless solution

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11
Q

Pb2+ + NH3 (aq)

A

Dropwise: White ppt of formed
Excess: White ppt insoluble in excess

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11
Q

Al3+ + NH3 (aq)

A

Dropwise: White ppt of formed
Excess: White ppt insoluble in excess

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12
Q

NH4+ + NH3 (aq)

A

Dropwise: No ppt formed

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13
Q

Fe2+ + NH3 (aq)

A

Dropwise: Green ppt of formed
Excess: Green ppt insoluble in excess

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14
Q

Fe3+ + NH3 (aq)

A

Dropwise: Reddish brown ppt formed
Excess: Reddish brown ppt insoluble in excess

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15
Q

Cu2+ + NH3 (aq)

A

Dropwise: Blue ppt formed
Excess: Blue ppt soluble in excess, giving a dark blue solution

Chemistry (2 decks)

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