(20 point multiple choice ) WHAT IS THE MOLARITY OF THE SOLUTION? A solution consists of 40g of Cuso4 dissolved in 200 ml of water. The molar mass of Cu is 63.55, the molar mass of S is 32.07, and the molar mass of O is 16.

A. 0.2 m
B.1.253 m
C.200 m

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.