acid & alkalis Flashcards
Hydrochloric acid
in stomach, helps to digest food
Ascorbic acid
vitamin C in fruit, keeps skin healthy and helps to make bones
Omega-3 fatty acid
from oily fish/soya beans, essential to help defend human body against disease
Ethanoic acid (vinegar)
to preserve fruit & vegetables in pickles
Carbonic acid (fizzy drinks)
flavour & it is a preservative
Methanoic acid (natural)
makes bee and ant stings painful, makes sweat smelly
Common Acids in Laboratory (3)
Nitric acid
Sulphuric acid
Hydrochloric acid
Laboratory alkalis (3)
Sodium hydroxide
Potassium hydroxide
Ammonium hydroxide
alkalis characteristics (3)
extremely corrosive, cause blindness and blister
Ranges from? (pH scale)
0-14
acid (pH scale)
less than 7
alkali (pH scale)
more than 7
why is vinegar, ethanoic acid diluted
it is mixed with large amount of water
why is ethanoic acid in lorry a concentrated solution?
it is mixed with very little water
acid + alkali = ?
neutral solution (neutralisation)
