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Chemistry > Qualitative Analysis > Flashcards

Qualitative Analysis Flashcards

memorise colours and tests

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1
Q

What is the test for carbonate (CO3 2-) anion?

A

Add dilute acid
Observation: effervescence, CO2 produced

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2
Q

What is the test for chloride (Cl -) anion?

A

add dilute nitric acid, add few drops of aqueous silver nitrate
Observation: White precipitate produced

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3
Q

What is the test for iodide (I -) anion?

A

add dilute nitric acid, add few drops of aqueous silver nitrate
Observation: Yellow precipitate produced

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4
Q

What is the test for nitrate (NO3 -) anion?

A

add aqueous NaOH, add aluminium strips, warm gently
Observation: effervescence, ammonia produced

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5
Q

What is the test for sulfate (SO4 2-) anion?

A

add dilute nitric acid, add few drops of aqueous barium nitrate
Observation: White precipitate produced

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6
Q

What is the effect of NaOH and NH3 in Aluminium (Al 3+) cation

A

NaOH: White precipitate, soluble in excess giving colourless solution

NH3: white precipitate, insoluble in excess

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7
Q

What if the effect of NaOH and NH3 in ammonium (NH4 +) cation?

A

NaOH: ammonia produced on warming

NH3: No reaction

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8
Q

What is the effect of NaOH and NH3 in calcium (Ca 2+) cation?

A

NaOH: white precipitate, insoluble in excess

NH3: No precipitate

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9
Q

What is the effect of NaOH and NH3 in Copper(II) (Cu 2+) cation?

A

NaOH: light blue precipitate, insoluble in excess

NH3: light blue precipitate, soluble in excess giving dark blue solution

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10
Q

What is the effect of NaOH and NH3 in Iron (II) (Fe 2+) cation?

A

NaOH: Green precipitate, insoluble in excess

NH3: Green precipitate, insoluble in excess

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11
Q

What is the effect of NaOH and NH3 in Iron (III) (Fe 3+) cation?

A

NaOH: red-brown precipitate insoluble in excess

NH3: red-brown precipitate, insoluble in excess

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12
Q

What is the effect of NaOH and NH3 in lead(II) (Pb 2+) cation?

A

NaOH: white precipitate, soluble in excess giving colourless solution

NH3: white precipitate, insoluble in excess

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13
Q

What is the effect of NaOH and NH3 in zinc (ZN 2+) cation?

A

NaOH: white precipitate, soluble in excess giving colourless solution

NH3: white precipitate, soluble in excess giving colourless solution

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14
Q

What is the test for Sulfur Dioxide (SO2) gas?

A

turns aqueous acidified potassium manganate (VII) from purple to colourless

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Chemistry (9 decks)

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