reaction with metals and oxygen Flashcards
what kind of reaction is gaining oxygen
oxidation
metal + oxygen =
metal oxide
what is losing oxygen
reduction
metal + water
metal hydroxide + hydrogen
how are metals displaced
more reactive metals displace less reactive chemicals
half equation: oxidation =
loss of electrons
what is acid state symbol
(aq)
half equation: reduction =
gain of electrons
hydrochloric acid formula
HCL
sulfuric acid formula
H2SO4
nitric acid formula
HNO3
how do acids dissociate and what does this produce
acids dissociate in aq solutions to produce H+ ions
HCL —->
HCL —-> H+(aq) + Cl-(aq)
what are bases and alkalis
chemicals which neutralises acids
what do acids and alkalis or bases produce
salt + water
what are bases and alkalis usually
metal oxides or hydroxides
how are alkalis different from bases
alkalis are soluble in water
what do alkalis produce in aqueous solutions
OH- ions
what is produced in neutralisation
water
H+ + OH- —> H2O
acid + metal
acid + metal —> salt + hydrogen
acid + base
salt + water
acid + alkali
salt + water
acids + metal carbonates
salt + water + carbon dioxide
strong vs weak acids in aqueous solutions
strong acids fully ionise while weak acids partially ionise in aqueous solutions
what are 3 weak acids
carbonic acid
ethan pic acid
citric scid
what does the ph scale give an idea of
the concentration of hydrogen ions
as the ph scale..
as the ph scale decreases by one unit the concentration of hydrogen atoms increase by 10 times
