Precipitation with aqueous sodium hydroxide(NaOH) and Ammonia

White precipitate,will redissolves when an excess of NaOH(aq) is added to give a clear,colourless solution

When added NaOH(aq) to aluminium(Al3+) what is the positive result

No precipitate but produce ammonia on warming

When added NaOH(aq) to ammonium(NH+(4)) what is the positive result.

Form a white precipitate, it is insoluble in excess NaOH(aq)

When added NaOH(aq) to Calcium, what is the positive result

Form a green precipitate and will redissolve in excess NaOH(aq)

When added NaOH(aq) to Chromium (III),Cr3+, what is the positive result

Form a light blue precipitate and it will insoluble in excess NaOH(aq)

When added NaOH(aq) to Copper(II),Cu2+, what is the positive result

Form a green precipitate and it is insoluble in excess NaOH(aq) but starts to turn brown near the surface if left to stand

When added NaOH(aq) to Iron(II),Fe2+, what is the positive result

Form a red-brown precipitate and it is insoluble in excess NaOH(aq)

When added NaOH(aq) to Iron(III),Fe3+, what is the positive result

Form a white precipitate and it will redissolve in excess NaOH(aq) to give a clear, colourless solution

When added NaOH(aq) to Zinc,Zn2+, what is the positive result

Form a white precipitate and insoluble in excess NH3(aq)

When NH3,ammonia added to Aluminium,Al3+ what is the positive result

No reaction

When NH3,ammonia added to Ammonium,Al(4) 1+ what is the positive result

No precipitate or very slightly white precipitate

When NH3,ammonia added to Calcium,Ca2+ what is the positive result

Form a green precipitate and insoluble in excess NH3(aq)

When NH3,ammonia added to Chromium(III),Cr3+ what is the positive result

Form a light blue precipitate and soluble in excess NH3(aq) producing a dark blue solution

When NH3,ammonia added to Copper,Cu2+ what is the positive result

Form a green precipitate and insoluble in excess NH3(aq) but starts to turn brown near the surface if left to stand

When NH3,ammonia added to Iron(II),Fe2+ what is the positive result

Form a red-brown precipitate and insoluble in excess NH3(aq)

When NH3,ammonia added to Iron(III),Fe3+ what is the positive result

Form a white precipitate and redissolve in excess NH3(aq) to give a clear , colourless solution

When NH3,ammonia added to Zinc,Zn2+ what is the positive result