7) Which solution is the most acidic? Show your work.
a) pH = 5.6
c) [OH-] = 3.1 x 10-8M
b) pOH = 9.2
d) [H+] = 6.25 x 10-11 M

The lattice enthalpy (formation of ionic solid from ions in the gas phase) for agcl(s) is -916 kj/mol and the hydration enthalpy (dissolution of gaseous ions into water) is -850 kj/mol. how much heat (in joules) is involved in forming 1l of saturated agcl solution (1.8 × 10-4 g / 100 ml water) by dissolving agcl(s)? assume solution volume does not change much upon dissolution. the equations are given below. ag+(g) + cl−(g) æ agcl(s)