acids, bases and salts Flashcards
indicator
substances which change colour when added to acids and alkalis
what is the most well-known indicator
litmus
what colour does litmus turn in acids
red
what colour does litmus turn in alkalis
blue
what indicaator is most used in the labatory
universal indicator
what does universal indicator show
the pH of the solution
what do acids produce when dissolved in water
hydrogen ions
what do alkalis produce when dissolved in water
hydroxide ions
what is a base that dissolves in water
alkali
when does a neutralisation reaction occur
when an acid and alkali cancel eachother out
neutralisation reactions always produce
salt and water
what is created when acids react with metals
salt and hydrogen gas
what happens during the reaction between acids and metals
- bubbling
- temperature rise
what do acids reacted with alkalis make
salt and water
the reactions of acids with alkalis is
exothermic