C6 - Making Useful Chemicals Flashcards
what is an acid?
a substance with a pH less than 7
what is an alkali?
a solution that has a greater pH than 7
true or false: the higher the hydrogen ion concentration, the more acidic something is
true
what ways can you measure the pH?
an indicator
a pH probe attached to a pH meter
what happens if the H+ ions increases by 10?
the pH decreases by 1, becoming more acidic
what happens to acids when they ionise?
they produce hydrogen ions, H+
what type of acid completely ionises in water?
strong acids
all acid molecules dissociate to release H+ ions
what type of acid does not fully ionise in solution?
weak acids
only a small proportion of acid molecules dissociate to release H+ ions
why do strong acids react quicker than weaker acids?
because the concentration of H+ ions is higher
