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Positive Ions ­ Reactions with
NAOH ( Sodium Hydroxide)
-Copper( 11) ­ forms a blue precipitate
- Iron ( 11) ­ forms a `dirty' green precipitate
- Iron ( 111) forms a red-brown precipitate
- Aluminum
- Magnesium white precipitate
- Calcium…read more

Slide 3

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Tests for negative ions
· Carbonates ­ add dilute acid ­ test for CO2
with lime water- if fizzes = carbonate ions
· Sulphates ­ add dilute acid + Barium
Chloride = white precipitate
· Halides- add dilute acid- Chlorine = white
precipitate, Iodine= cream precipitate,
Bromine= yellow precipitate…read more

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