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Chemistry EE (Salt (Salts can be many different colours (Sodium chromate…
Chemistry EE
Salt
Ionic Compound
Electrically Neutral
Made up of Cations and Anions
This is usually an inorganic salt
The anion is commonly a halide
The Cations is commonly a metal
Atoms can be polyatomic
Ammonium Salts
Salts can be many different colours
Table-salt (NaCl) is transparent
Sodium chromate is yellow
Sodium dichromate is red
Potassium Permanganate is Purple
Iron Disulphide is goldfish
Diazonium Salts are used for dye pigments for clothes
Fireworks colours are produced by burning salts
Salts can be sweet (don't have to taste salty :))
Acids And Bases
Acid-Base Neutralisation / Double Displacement Reaction
CuO(s)+H2SO4(l)-------> CuSO4 (aq) + H2O (l)
Insoluble Base reacts with Acid produces water and a soluble salt
NaOH(aq) + HCl(aq) -------> NaCl (aq) + H2O (l)
Acid=Anything that donates a proton
Base=Anything that accepts a proton
Solubility
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Some salts are sparingly soluble in water
Meaning only a small amount can dissolve and the rest stays as crystals
Some salts are soluble in water
Salts of this kind are made with sodium, potassium, and ammonium cations, and nitrate anions
Some salts are highly insoluble (in water)
Salts of this kind are made of carbonate anions
FACTORS OF SOLUBILITY
Pressure
Particle Size
Temperature
Gases increase in solubility as temp. decreases
Solids increase in solubility as temp. increases
Salts dissolved in water have the ability to conduct electricity
Forming Salts
Acid+Base=Salt (aq) + water
Metal + acid
Eg.
Metal + non-metal
Eg: Ca + Cl2 ----> CaCl2