acids and bases 1.5 Flashcards
how do you measure the pH
universal indicator and pH paper
what colour are acids on the pH scale
red-orange-yellow
what colour are alkalis on the pH scale
dark green-blue-purple-pink
what colour and number are neutral solutions on the pH scale
7 and green
what do acidic solutions contain more of
H+ ions that OH- ions
what do alkaline solutions contain more of
OH- ions than H+
neutral solutions contain equal amounts of what
H+ ions and OH- ions
what is neutralisation
when an acid and base react to give a neural solution
what happens when you neutralise an acid
the pH increases to 7
what happens when you neutralise an alkali
the pH decreases to 7
what are the products of an acid + metal hydroxide
salt + water
what are the products of an acid + metal oxide
salt + water
what are the products of an acid + metal carbonate
salt + water + carbon dioxide
why do we use pipettes
to accurately measure the sample
when are acids formed
when soluble non-metal oxides dissolve in water and increase the H+ ion concentration
