Aluminium, Calcium or Magnesium +Sodium hydroxide -> white preciptates
Aluminium hydroxide +sodium hydroxide -> disolves
Copper(II), Iron (II), or Iron (II) +Sodium hydroxide --> coloured precipitates
Carbonates+Dilute acids -> Carbon Dioxide
Carbon Dioxide + Limewater -> White precipitate (cloudy)
Halide ions(aq) + Silver nitrate(aq) +Nitric Acid -> precipitates (Increasingly yellow down table from Cl-I)
Sulfate ions(aq) + Barium chloride(q) +Hydrochloric acid -> White precipitate
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