The AHsol for NaF is 82 kJ/mol, and the lattice energy is –923 kJ/mol. If the hydration enthalpy of sodium is 21 kJ/mol more than the hydration enthalpy of fluoride, what are the hydration enthalpies for the sodium and fluoride ions? Use A
Hsol = - Hat+ H hydr
O sodium: -841 kJ/mol; fluoride: -862 kJ/mol
O sodium: -431 kJ/mol; fluoride: -410 kJ/mol
Osodium: -410 kJ/mol; fluoride: -431 kJ/mol
O sodium: -389 kJ/mol; fluoride: -410 kJ/mol

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.