Question #43a9c

1 Answer
Alfredo T.
Apr 12, 2016

HCl, hydrogen chloride

Explanation:

A conjugate acid is obtained, in the Brönsted-Lowry scheme, by protonating a base; chloride ion in this example. To protonate means to add a proton, i.e. an hydrogen ion #H^+#:

#Cl^"-" + H^+ = HCl#

Hydrogen chloride is a molecular gaseous substance. It can be prepared from the conjugate base #Cl^-# by adding concentrate sulphuric acid to a chloride salt and heating the mixture.

#H_2SO_4(l) + NaCl(s) -> HCl(g) + NaHSO_4(s)#

#HCl(g)# can be dissolved in water up to 36% concentration w/w. Dissolution is accompained by complete ionisation to give rise again to the conjugate base #Cl^-# (chloride) and hydrated hydrogen ions (#H^+#)

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