Chemistry · Various concepts of acids and bases (Arrhenius, Bronsted Lowry and Lewis) and their ionization, acid-base equilibria (including multistage ionization) and ionization constants
The pair of compounds which cannot exist together in aqueous solution is:
The pair of compounds which cannot exist together in aqueous solution is:
- A. \( N a_{2} C O_{3} \) and \( N a H C O_{3} \)
- B. \( N a H C O_{3} \) and \( N a O H \)
- C. \( N a O H \) and \( N a H_{2} P O_{4} \)
- D. Both (B) and (C)
Step-by-step solution
NaHCO3 reacts with NaOH to form Na2CO3 and water, and NaH2PO4 reacts with NaOH to form Na2HPO4 or Na3PO4 and water. Both reactions occur in aqueous solution, so these pairs cannot coexist. Option A (Na2CO3 and NaHCO3) can coexist as they form a buffer. Thus both B and C are correct.
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