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$HCl/H_2O$ forms an azeotrope at atmospheric pressure at ~108.6°C with an $HCl$ concentration of ~20.2% If you try to distill your 23% mixture, you will outgass a bit of HCl as the mixture heats, thereafter you'll get constant boiling azeotrope. If you bought a pool acid or other commercial HCl mix, distilling this might be a good first step, though. They ...


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