so it takes longer to boil salty water, and the boiling point is higher too. Katie: Wow, that's fascinating stuff. Thank you very much, Miss Fong. For example, salt is a pure substance made only ...

so it takes longer to boil salty water, and the boiling point is higher too. Katie: Wow, that's fascinating stuff. Thank you very much, Miss Fong. For example, salt is a pure substance made only ...