Question

The equation that describes the change in temperature of a solvent due to a solute is AT6 = i xKb x molality. How much salt would one need to add to 1 kg water to change the boiling temperature
by 5°C? Give your answer in moles. Show your work. (Kb =
0.51°Cfor water and i = 2 for NaCl.

Answer 1

4.9 moles of salt are required to be added to 1 kg water to change the boiling temperature

by 5°C.

What is the moles of Salt required to change the temperature of water by 5°C?

Based on the given equation, the molality of the solution is calculated as follows:

• Molality = change in temperature/ Kb × I

Change in temperature = 5 °C

Kb = 0.51

i = 2

Molality = 5/0.51 × 2 = 4.9 molal

Also, Molality = moles/kg of water

Moles of salt = molality × kg of water

Moles of salt = 4.9 × 1 = 4.9 moles.

Therefore, 4.9 moles of salt are required to be added to 1 kg water to change the boiling temperature

by 5°C.

Learn more about molality at: https://brainly.com/question/9149034

#SPJ1