When NH3 gas is exposed to HCl, white fumes are formed which are chemically:
Correct answer: B. NH4Cl
- A. NH4+
- B. NH4Cl
- C. HCl fumes
- D. Cl
Explanation
b) NH4Cl:NH4Cl is the correct chemical formula for ammonium chloride. When NH3 gas reacts with HCl gas, it forms ammonium chloride (NH4Cl), which is a white solid. The white fumes observed in this reaction are attributed to the formation of NH4Cl.
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About Bronsted-Lowry and Lewis Concepts
The Brønsted-Lowry concept defines acids as proton donors and bases as proton acceptors, producing conjugate acid-base pairs. The Lewis concept extends the idea to electron-pair acceptors and donors, so compounds such as BF3 and NH3 can be treated as acid and base even without proton transfer, unlike the Arrhenius definition.
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