Question

1. The solubility product, K_sp, for aluminum hydroxide, Al(OH)₃, is 1.9 ✕ 10⁻³³ at 25°C. What is the molar solubility of aluminum hydroxide in a solution containing 0.061 M KOH at 25°C?
Answer in molarity.

  

2. Complete the following table of data for NaCl. (Assume the density of water is 1.00 g/mL.)

T (°C)	Solubility (g/100. g)	Concentration (M)	Ksp	ΔG (kJ/mol)
13.0	36.8
25.0	37.1
37.0	37.5
49.0	38.1
61.0	38.7
73.0	39.5
85.0	40.4

Use a graph of ΔG vs. T to determine the following. (Enter your answers to three significant figures.)

What is the value of ΔH for the system?
Answer in kJ/mol

What is the value of ΔS for the system?
Answer in J/mol·K

Answer 1