Answer:
Due to difference in the values of electronegativities.
Explanation:
A covalent bond is formed between hydrogen atom with a partial positive charge on it and another atom, such as oxygen, have a partial negative charge on an adjacent molecule. This is because of the difference in the values of electronegativities. The hydrogen atom has lower electronegativity value as compared to oxygen so the shared pair of electron is slightly attracted by oxygen atom towards itself and formed partial positive charge on hydrogen and partial negative charge on oxygen atom.
You can try this simple experiment to change salt water into freshwater. This is a process called "desalination." The water evaporates and leaves the salt behind, so the water you collect in your collection glass is clean drinking water. ... Add a few spoonfuls of salt to the water. Make the water as salty as you like.
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this is not my answer i got it from safari but if you need me to rewrite it feel free to ask❤️!