If you add salt to water, why do you do it? Is it to season your pasta or rice or is it because you think it will change the boiling point of the water? When you salt water, it does raise the boiling point of the water, a phenomenon called boiling point elevation, but the increase in temperature isn't enough to matter. You would need to add 58 grams of salt per liter of water just to raise the boiling point one half of a degree Celsius. That's a lot of salt!
Do you add salt to water when you boil it? If so, what is your reason?