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Why Do You Add Salt to Boiling Water?

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Salt increases the boiling point of water.

The main reason salt is added to water before boiling is because it increases the boiling point of the water.

Markus Schweiss
Question: Why Do You Add Salt to Boiling Water?
Why do you add salt to boiling water? There are a couple of answers to this common cooking question. Here's a look at the reason for salting water.
Answer: Usually when you're adding salt to water it's to boil the water to cook rice or pasta. Adding salt to water adds flavor to the water, which is absorbed by the food. Another reason salt is added to water is because it increases the boiling point of the water, meaning your water will have a higher temperature when you add the pasta, so it will cook better.

That's how it works in theory. In reality, you would need to add 230 grams of table salt to a liter of water just to raise the boiling point by 2° C. That is 58 grams per half degree Celsius for each liter or kilogram of water. That is much more salt than anyone would care to have in their food.

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