chemical changes Flashcards
(25 cards)
metal oxide
a compound formed when a metal ionically bonds with oxygen
reactivity series
the order of elements in terms of their reactivity
acid
a substance that released H+ ions and has a pH below 7
base
a substance that neutralises an acid having a pH above 7
alkali
a type of soluble base. a metal hydroxide. Releases OH- ions
neutralisation
when an acid reacts with a base to produce a salt and water
carbonates
Ionic compounds containing carbon and oxygen
salt
ionic compound formed when acid and base reacts
soluble
a substance that dissolves
insoluble
a substance that doesn’t dissolve
indicator
a substance that changes colour when pH changes
electrolysis
splitting up an ionic substance using electricity
molten
turned into a liquid
solution
dissolves in water
suitable indicators for titrations
methyl orange ~ acid: red, alkali: yellow
litimus ~ acid : red, alkali : purple
why shouldn’t we use universal indicators for titrations?
universal indicators change from colour to colour (a mixture of colours) when doing titrations we want a sudden colour change
what do metal and oxygen make?
metal + oxygen —> metal oxide
what do metal and water make?
metal + water —> metal hydroxide + hydrogen
what metal and acid make?
metal + acid —> salt + hydrogen
what does metal carbonate + acid make?
metal carbonate + acid —> salt + water + carbon dioxide
what does a metal oxide and acid make?
metal oxide + acid —> salt + water
test for chlorine
chlorine bleaches damp litmus paper, turning it white
hydrogen test
squeaky pop, with a lighted splint
test for oxygen
oxygen will relight a glowing splint
