No citric acid added to water does not make soft water. I decreases the pH of the water so it can be used as a hair rinse similarly to ACV or white vinegar. A final acidic rinse helps the cuticle of the hair lay flat I believe, and when used after a shampoo bar helps prevent soap buildup in the hair. Soap is also alkaline (high pH) so the acidic rinse helps bring the scalp and hair back to normal pH.
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