20.1 Brønsted-Lowry acids and bases Flashcards Preview

Fckn Chemistry Module 5 > 20.1 Brønsted-Lowry acids and bases > Flashcards

Flashcards in 20.1 Brønsted-Lowry acids and bases Deck (15):
1

How does the earliest model describe acids/bases?

As acids being sour and alkalis being from plant ashes

2

How does the 1754 model describe acids/bases?

‘base’ + acid = solid

3

How does the 1832 model describe acids/bases?

It describes the role of hydrogen with acids containing hydrogen

4

How does the 1884 model describe acids/bases?

The Arrhenius model shows that acids release H+ and bases release OH- ions (in aqueous solution)

5

How does the 1923 model describe acids/bases?

The Bronsted-Lowry model shows central role protons

6

What is a bronsted Lowry acid?

A proton doner

7

What is a bronsted lowly base?

A proton acceptor

8

What does a conjugate base pair contain?

2 species interconnected by the transfer of a proton

9

In aqueous solution what causes dissociation to take place?

Water being present

10

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)

11

How can the neutralisation of an acid by an alkali be written?

H3O+ + OH- = 2H2O
H+ + OH- = H2O

12

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)

13

When acids react with metals, carbonates, metal oxides and alkalis what is the active ingredient?

H+

14

What are spectator ions?

Ions that do not change during the reaction

15

What is the ionic equation for acids reacting with alkalis?

H+ (aq) + OH- (aq) = H2O (l)