Flashcards in 20.1 Brønsted-Lowry acids and bases Deck (15):
How does the earliest model describe acids/bases?
As acids being sour and alkalis being from plant ashes
How does the 1754 model describe acids/bases?
‘base’ + acid = solid
How does the 1832 model describe acids/bases?
It describes the role of hydrogen with acids containing hydrogen
How does the 1884 model describe acids/bases?
The Arrhenius model shows that acids release H+ and bases release OH- ions (in aqueous solution)
How does the 1923 model describe acids/bases?
The Bronsted-Lowry model shows central role protons
What is a bronsted Lowry acid?
A proton doner
What is a bronsted lowly base?
A proton acceptor
What does a conjugate base pair contain?
2 species interconnected by the transfer of a proton
In aqueous solution what causes dissociation to take place?
Water being present
Why is water needed for dissociation to take place in aqueous solution?
Water gains a proton to form H3O+ (the hydronium ion-active ingredient in any acid)
How can the neutralisation of an acid by an alkali be written?
H3O+ + OH- = 2H2O
H+ + OH- = H2O
What does mono/di/tribasic refer to?
The total number of hydrogen ions in acid that can be replaced per molecule in an acid-base reaction (organic acids don’t replace H’s from carbon chains)
When acids react with metals, carbonates, metal oxides and alkalis what is the active ingredient?
What are spectator ions?
Ions that do not change during the reaction