[sprotz]

I read an article somewhere that heating a dry mixture of sodium chloride (salt) and sodium bicarbonate (baking soda) powders will give off Hydrogen Chloride gas. Is that true ?

[chenbeier]

No, where did you read it. Baking soda will convert to sodium carbonate by releasing water and carbon dioxide. The sodium chloride will not touched.

[sprotz]

Here is the article: http://amedleyofpotpourri.blogspot.com/2011/12/making-hydrochloric-acid-from-household.html

But I'm sure that heating baking soda and calcium chloride will give Hydrogen chloride because it was listed in an official article.

[chenbeier]

This article is written like tale. The guy never did it by himself. All what he wrote he assumed may  be happen, but have no prove.

Failures in formulas also present like the acetic acid, it is propionic acid.

The only reaction what takes place is 2 NaHCO₃ => Na₂CO₃ + H₂O + CO₂

This also happen if you bake cake.

NaCl will not touched. If it would, then you have hydrochloric in your cake.