Copper + silver
________ → no reaction (unreactive) layer is insoluble in water, is formed and coated around the metal.
Alkalis
________ have a bitter taste and feels soapy.
Ammonium
________ (NH4) salts contains nitrogen.
electricity
Acids can conduct ________.
Alkalis
________ reacts with acids to form salt and water ONLY.
Alkalis
________ are corrosive when concentrated.
insoluble particles
Precipitate= ________ produced in liquid by chemical reaction.
pH of soil unsuitable for plant growth due to
too much fertiliser added to the soil or environmental pollution such as acidic rain
pH range -indicator changes colour
5-8