When hydrogen chloride gas passes through saturated brine, it increases the concentration of:
Correct answer: B. Chloride ions
- A. Sodium ions
- B. Chloride ions
- C. Both sodium and hydrogen ions
- D. Hydrogen ions
Explanation
When hydrogen chloride gas passes through a saturated solution of brine (NaCl), it dissociates into H+ ions and Cl- ions. The dissociation of HCl increases the concentration of Cl- ions. Due to Cl- ions being common in both, these ions suppress the ionization of NaCl.
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About Chemical Equilibrium
Reversible reactions reach dynamic equilibrium when forward and reverse rates become equal, and Le Chatelier's principle predicts the effect of changing concentration, pressure or temperature. The chapter also covers solubility product, the common ion effect, buffer action and the conditions used in Haber's process, with equilibrium shifts distinguished from changes in the equilibrium constant.
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