For each of the following, choose the measurement with the appropriate si prefix a 4.802 x 10-g 4.802 kg 4.802 ug 4.802 mg 4.802 ng b. 3.80 x 10-m 3.80 nm 3.80 km 3.80 cm 3.80 um c. 2.798 x 10-25 2.798 ps 2.798 cs 2.798 us 2.798 ds d. 8.8 x 10- 8.8 ng 8.8 pg 8.8 mg 8.8 kg

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.