Question

What happens when KCl is added to H2O

Answer 1

Potassium chloride does not react with water. It will dissolve though, resulting in ionisation. These ions may be separated out by electrolysis, resulting in free chlorine which is highly reactive though, and metallic potassium which does react with water. To get these elements by themselves, you can pass electricity through a vat of molten potassium chloride.
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Answer 2

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⏩Potassium is most stable when it loses its outer electron, becoming K+, and chlorine is most stable when it gains an electron, becoming Cl-.

Water, H2O, is a polar molecule, and has partial positive and negative charges. The hydrogens on water are partially positive, and the oxygen on water is partially negative.

Since opposite charges attract, the oxygen of the water molecules are attracted to the K+, and the hydrogens are attracted to the Cl-. The water actually surrounds the K+ and Cl- so that the opposite charges are allowed to be close together. When KCl is thrown in water, it immediately splits apart to K+ and Cl- and the water surrounds/dissolves it.

⏩When an ionic bond dissociates in water (in this case KCl) it splits up into its ions. So K+ and Cl-. The Oxygen in the water molecules will surround the K cation and the Hydrogen will surround the Cl anion, due to their electrostatic forces of attraction.Therefore the ionic substance has been dissolved.



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