The volume strength of 1.5 N H2O2 solution is_______?
Correct answer: D. 8.4
- A. 4.8
- B. 5.2
- C. 8.8
- D. 8.4
Explanation
For hydrogen peroxide decomposition, 1 equivalent of H2O2 produces 5.6 L of O2 at STP per litre of a 1 N solution. Therefore, volume strength = 1.5 eq L^-1 x 5.6 L O2 eq^-1 = 8.4 L O2 per L solution, or 8.4 volumes, so d is correct. A likely mistake is choosing 4.8 or 5.2 by using an incorrect equivalent factor.
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