Acid and Base Equilibria

Question 1

what’s an acid 2 ?

Answer 1

proton donor which releases H+ when in SOLUTION

Question 2

what’s a base ? 2

Answer 2

proton ACCEPTOR - accepts H+ when in solution

Question 3

What is a vital characteristic for a base ? 1

Answer 3

it needs to be able to accept a Proton so it needs a LONE PAIR .

Question 4

How can we find the conjugate acid and base pairs ? 2

Answer 4

• they differ by one H+ and a charge
• the acid has more hydrogens
• the base is more negatively charged

Question 5

what’s water ? 2

Answer 5

it’s and acid and base = AMPHOTERIC

Question 6

when acids and bases react together they form…

Answer 6

salt + water

Question 7

When acid and bases react together a change in enthalpy occurs - what is this called and define it .
4

Answer 7

• Standard enthalpy change of neutralisation = enthalpy change when solution of acid and base react together to from 1 MOLE of water under standard states and conditions .

Question 8

weak acids and bases dissociation level ?

Answer 8

• only partly dissociate

Question 9

strong acid / bases dissociation level ?

Answer 9

• FULLY dissociate

Question 10

The enthalpy change in neutralisation for weak acids and bases are ?3

Answer 10

• h+ and oh- reaction enthalpy
• dissociation enthalpy too as they have to dissociate more to replenish the small number of H+ released when they react with water .(weak bases = only partially dissociate ).

Question 11

whats the difference between base and an alkali ?1

Answer 11

Alkali is insoluble . Bases are soluble in water.