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Chemistry > Tests for aqueous cations > Flashcards

Tests for aqueous cations Flashcards

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1
Q

Aluminium, Al3+

A

Aq. NaOH- White ppt, soluble in excess, giving a colourless solution

Aq. Ammonia- white ppt, insoluble in excess

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2
Q

Ammonium, NH4+

A

Aq. NaOH- Ammonia produced on warming

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3
Q

Calcium, Ca2+

A

Aq. NaOH- White ppt, insoluble in excess

Aq. Ammonia- no ppt or very slight white ppt

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4
Q

Chromium(III), Cr3+

A

Aq. NaOH- Green ppt, soluble in excess

Aq. Ammonia- Grey-green ppt, insoluble in excess

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5
Q

Copper(II), Cu2+

A

Aq. NaOH- Light blue ppt, insoluble in excess

Aq. Ammonia- light blue ppt, soluble in excess, gives dark blue solution

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6
Q

Iron(II), Fe2+

A

Aq. NaOH- Green ppt, insoluble in excess, ppt turns brown near surface on standing

Aq. Ammonia- green ppt, insoluble in excess

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7
Q

Zinc, Zn2+

A

Aq. NaOH- White ppt, soluble in excess, giving a colourless solution

Aq. Ammonia- White ppt, soluble in excess, giving a colourless solution

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Chemistry (4 decks)

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