In the reaction 3Cu + 8HNO₃ → 3Cu(NO₃)₂ + 2NO + 4H₂O. What is the equivalent weight of HNO₃? (If the molecular weight of HNO₃ is M).
Correct answer: D. 4/3 M
- A. M
- B. M/3
- C. 3/4 M
- D. 4/3 M
Explanation
The n-factor for HNO₃ in the overall reaction is the total electrons transferred (6) divided by the moles of HNO₃ used (8), which equals 3/4. The equivalent weight is Molecular Weight / n-factor = M / (3/4) = 4M/3
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