11. Predicting Reactions of Metals Flashcards
define a corrosion reaction
when a metal reacts with oxygen, and forms a metal oxide (IS OXIDISED)
define a displacement reaction
AB + CD = AD + BC (aka a substance is displaced with another)
metal + water?
metal + liquid water = metal hydroxide + hydrogen gas
metal + acid?
metal + acid = salt + hydrogen gas
If a metal is more reactive than the metal cation bonded to the non-metal anion?
it will displace it; based on the activity series
what is the activity series
In chemistry, a reactivity series is an empirical, calculated, and structurally analytical progression of a series of metals, arranged by their “reactivity” from highest to lowest.
limitations of the activity series
limited by its QUALITATIVE observations, aside from reactivity, there are numerous other factors which influence rate of reaction
- presence of a catalyst
- temperature of substances
- surface area of solid reactants
- concentration of reactants in solutions
- pressure of gaseous reactants and products
all this is linked to collisions theory
how does core charge change when moving across the periodic table
moving down groups: no change in core charge
moving across periods: core charge increases
how does electronegativity change when moving across the periodic table
moving down groups: less electronegative
moving across periods: more electronegative
how does atomic radius change when moving across the periodic table
moving down groups: atomic radius increases
moving across periods: atomic radius decreases
how does ionisation energy change when moving across the periodic table
moving down groups: ionisation energy decreases
moving across periods: ionisation energy increases
how does metal reactivity change when moving across the periodic table
moving down groups: metal reactivity increases
moving across periods: metal reactivity decreases
