An excess of silver nitrate is added to the aqueous barium chloride and the precipitate is removed by filtration. What are the main ions in the filtrate?
Correct answer: B. Ag+ and NO3- and Ba2+ only.
- A. Ag+ and NO3- only.
- B. Ag+ and NO3- and Ba2+ only.
- C. NO3- and Ba+2 only.
- D. CI- and NO3- and Ba2+ only.
Explanation
The reaction is 2AgNO₃ + BaCl₂ → 2AgCl(s) + Ba(NO₃)₂. Since AgNO₃ is in excess, the unreacted Ag⁺ ions will be in the filtrate along with the spectator Ba²⁺ and NO₃⁻ ions. The Cl⁻ ions are completely precipitated as AgCl.
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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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