Question

How is the boiling point of water affected when some salt is added to it?

Answer 1

If you add salt to water, you increase its boiling point. The temperature needs to be increased about one half degree Celsius for every 58 grams of dissolved salt per kilogram of water.
When you add salt to water, sodium chloride dissociates into sodium and chlorine ions. These charged particles alter the intermolecular forces between water molecules. In addition to affecting the hydrogen bonding between water molecules, there is an ion-dipole interaction to consider. The ion-dipole interaction is stronger than the hydrogen bonding between the water molecules, so more energy is needed to move water away from the ions and into the vapor phase.