Consider the spontaneous dissolution of nacl in water: nacl(s) → na+(aq) + cl −(aq) predict whether the entropy change for this process is positive or negative and explain your answer. then, predict whether the free energy change for the process is positive or negative and explain your answer.

Determine the percent sulfuric acid by mass of a 1.61 m aqueous solution of h2so4. %

Quiz1. which physical state of nitrogen has the highest entropy? a solid© b gasoc 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.