What would happen if you took 20g of CuSO4 and placed it in a solution that already had 30g of CuSO4 in 100g of water at 60°C?

A: 10g of CuSo4 would remain undissolved
B: Cannot tell based on the information provided
C: All of the added salt would dissolve
D: 50g of CuSo4 would remain undissolved

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.