Question #43a9c

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Question #43a9c

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Answer 1 · 2016-04-12T20:55:50

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 $H^{+}$ $H^+$ :

$C l^{-} + H^{+} = H C l$ $Cl^"-" + H^+ = HCl$

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

$H_{2} S O_{4} (l) + N a C l (s) \to H C l (g) + N a H S O_{4} (s)$ $H_2SO_4(l) + NaCl(s) -> HCl(g) + NaHSO_4(s)$

$H C l (g)$ $HCl(g)$ 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 $C l^{-}$ $Cl^-$ (chloride) and hydrated hydrogen ions ( $H^{+}$ $H^+$ )

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Question #43a9c

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