A 30.0 mL sample of 0.200 M Ba(OH)2 is titrated with 0.100 M HCl. a) Determine the pH of the solution before the addition of HCl.
b) Determine the pH of the solution after the addition of 25.0 mL HCl.

What amount of heat is exchanged when 106.2 grams of substance y goes from a liquid at 35 degrees celsius to a solid at the same temperature? melting point of substance y = 35 degrees c; δhvaporization = 3.67 j/mol; δhfusion = 3.30 j/mol. mwsubstance y = 28.22 g/mol. −12.4 j −3.51 x 102 j 1.24 x 101 j 351 j