The acids are further divided into weak (picric, acetic and formic acid) and strong acids (nitric and hydrochloric acid).
en.wikipedia.org In general cases, these acetals can be deprotected back to the aldehyde by using hydrochloric acid.
en.wikipedia.org Moreover, the calcite alabaster, being a carbonate, effervesces upon being touched with hydrochloric acid, whereas the gypsum alabaster, when thus treated, remains practically unaffected.
en.wikipedia.org Liquid toilet bowl cleaners contain other acids, typically dilute hydrochloric, phosphoric, or formic acids.
en.wikipedia.org For example, copper is a rather unreactive metal, and has no reaction with concentrated hydrochloric acid.
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