buffer solutions

Question 1

What is a buffer solution?

Answer 1

= PH does not change significantly if small amounts of acid and alkali are added to it

Question 2

What is an acidic buffer solution made from?

Answer 2

= weak acid and a salt of that weak acid

Question 3

How is a basic buffer solution made?

Answer 3

= weak base, salt of that weak base
= reacting with a strong aicd

Question 4

How does buffer solutions work?

Answer 4

= acid => conjugate base + H+ ions
= in buffers there is a much more higher concentration of salt than pure acid

Question 5

What happens if small amounts of acid are added to the buffer?

Answer 5

= equalibrian will shift to the left, to remove the H+ ions added
= as there is a large concentration of salt ion in the buffer, the ratio stays constant, PH stays constant

Question 6

What happens if small amounts of alkali are added to the buffer?

Answer 6

= OH- ions react with H+ ions to form water
= shift tothe rihgt producing more H+ ions
= some acid molecules are changed to ions salt as there is a large con centration of salt ion in the buffer HA/A- stays constant

Question 7

What happens if a small amount of alkali is added to the buffer ?

Answer 7

=moles of buffer acid would reduce by thenumber of moles of alkali added
= moles of salt would increase by moles by the same amount
=