Acids, Bases and Salts Flashcards
Acid + Metal
Salt + H2
Base + Metal
Salt + H2
Acid + metalHCO3
Salt + CO2 + H2O
Acid + metalCO3
Salt + CO2 + H2O
Base + Acid
Salt + Water
Metal Oxide + Acid
Salt + Water
Non-metal oxide + base
Salt + Water
Acids and bases: taste
A: sour, lemon
B: bitter, soap/baking soda
Why does a stain of curry turn reddish brown when soap touches it
Curry contains turmeric which is a natural indicator
Soap is basic
Litmus is extracted from? Original colour
lichen, purple
Natural indicators examples
Turmeric, red cabbage leaves, petals of petunia
Acetic acid
CH3COOH
Phenolphthalein
A: no change (colourless)
B: pink
Methyl Orange Solution
A: red
B: yellow
Olfactory indicators
Onion, clove oil, vanilla: loses smell w base
Sodium Hydroxide and zinc
2NaOH + Zn»_space; H2 + Na2ZnO2 (sodium zincate)
Sodium Carbonate and Hydrochloric acid
Na2CO3 + 2HCl»_space; CO2 + H2O + 2NaCl
Sodium bicarbonate and hydrochloric acid
NaHCO3 + HCL»_space; H2O + CO2 + NaCl
Calcium carbonate + water + carbon dioxide
CaCO3 + H2O + CO2»_space; Ca(HCO3)2
Different forms of CaCO3
limestrone, marble, chalk
Sodium Hydroxide and hydrochloric acid
NaOH + HCl»_space; H2O + NaCl
Copper oxide and HCl observations
blue-green solution is formed (CuCl2)
CuO + 2HCl»_space; CuCl2 + H2O
Metallic oxides and non metallic oxides
basic (CuO)
Acidic (CO2)
what do all acids and bases have in common
Both acid and base conduct electricity as they produce H + and OH - ions respectively. Thus, both acid and base acts as an electrolyte.
Hydronium ion
H3O+
H2O + H+