I just randomly remembered my 9 year old sister telling my 14 year old crush that he looks like and elf... she goes "You're like me!" and he was like "what?" and she goes "you have elf ears too! Katie said that she thinks it's cute and that's one of the reasons she likes you!" I hadn't told him that I liked him yet so I turned bright red and my crush goes "Katie? Your sister is mean"

Answer asap need to be answered 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.