Author Question: The H for the solution process when solid sodium hydroxide dissolves in water is 44.4 kJ/mol. When a ... (Read 147 times)

nelaaney · **on:** Aug 27, 2018

The H for the solution process when solid sodium hydroxide dissolves in water is 44.4 kJ/mol. When a 12.6-g sample of NaOH dissolves in 250.0 g of water in a coffee-cup calorimeter, the temperature increases from 23.0 C to ________C.

Assume that the solution has the same specific heat as liquid water, i.e., 4.18 J/g-K. A) 35.2
B) 24.0
C) 36.4
D) 35.7
E) 40.2

Question 2

The Ksp for Zn(OH)2 is 5.0 10-17. Determine the molar solubility of Zn(OH)2 in a buffer solution with a pH of 11.5.

A) 5.0 106
B) 1.2 10-12
C) 1.6 10-14
D) 5.0 10-12
E) 5.0 10-17