Some students used a variety of procedures to investigate four liquid samples. The students recorded the following information.
• When Sample W was cooled, solid particles settled out of the liquid.
• The mass and volume of Sample X were measured, and the density of Sample X was
calculated to be 1.6 g/mL.
• Sample Y was heated, and the temperature was recorded. All the liquid boiled away at
the same temperature and left no residue in the container.
• When a dilute acid was added to Sample Z, gas bubbles formed and rapidly rose to the
surface of the liquid.

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.