Acids bases and buffers

Question 1

what affects Kc

Answer 1

Temperature only

Question 2

acid

Answer 2

Proton donor

Question 3

base

Answer 3

proton acceptor

Question 4

how is the dissociation of weak and strong acids different?

Answer 4

Weak acids partially dissociate

strong acids fully dissociate (*100% ionised in solution)

Question 5

what is Ka

Answer 5

acid dissociation constant

Question 6

what is 1x10^-14

Answer 6

Kw the ionic product of water

Question 7

equation for Ka

Answer 7

[H+][A-]/[HA]

Question 8

Define pH

Answer 8

-log[H+]

Question 9

how can the value of Ka be interpreted for an acid?

Answer 9

big ka = strong acid

small Ka = weak acid

Question 10

buffer solution

Answer 10

a system that minimises the changes in pH when a small amount of acid or base is added

Question 11

Why are buffer systems important

Answer 11

A small change in pH can cause damage in living organisms

Question 12

what is needed to make a buffer solution?

Answer 12

a mixture of a base and it salt

Question 13

define acid and conjugate base

Answer 13

Acid; is the product when a conjugate base accepts a proton

conjugate base is when a proton is lost in an acid

Question 14

Enthalpy change of Neutralisation

Answer 14

change when solutions of acid and alkali react together under standard conditions to produce one mole of water