Which of the following is TRUE? Group of answer choices a, A buffer is most resistant to pH change when [acid] = [conjugate base] b. An effective buffer has very small absolute concentrations of acid and conjugate base. c. None of the above are true. d. A buffer can not be destroyed by adding too much strong base. e. It can only be destroyed by adding too much strong acid. f. An effective buffer has a [base]/[acid] ratio in the range of 10 - 100.

Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.