Answers

2015-09-19T22:19:53+05:30
HCL gas is molecular HCL in gaseous phase, HCL acid is HCL in solution with water, and can be said to be in the form H⁺Cl⁻. It is the dissociation of the molecule into constituent ions, which gives an acid its properties. On a physical level, HCL gas is a yellow/green gas and HCL acid is a clear solution.
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