Question

What is the boiling point of a 6 m solution of NaCI in water? For water: Tr = 0.00°C Th = 100.°C K, = 1.860 °C/m Kb = 0.500 °C/m а. b. C. d. e. 102. °C 103 °C 104 °C 106 °C 108 °C

Answer 1

The boiling point of a 6 m NaCl solution in water is approximately 106.12°C, with the closest answer being option C. 106°C.

Step-by-step explanation:

The boiling point of a 6 m solution of NaCl in water can be determined by considering the boiling point elevation. The boiling point elevation constant (Kb) for water is given as 0.51°C/m.

Since NaCl dissociates into two ions (Na+ and Cl-), a 1 m solution of NaCl will effectively be a 2 m solution of particles. Therefore, the boiling point elevation would be approximately twice that of a non-ionizing solute.

The boiling point elevation for a 1 m solution of NaCl is then about 1.02°C (2 x 0.51°C/m).

For a 6 m solution, this would be six times greater, which equals 6.12°C (6 x 1.02°C).

Adding this to the normal boiling point of water, which is 100°C, we get a boiling point of approximately 106.12°C. Therefore, the closest answer to the boiling point of a 6 m NaCl solution is 106°C.