Find the PH of a 0.001 M solution of Nitric acid HNO3?
Correct answer: B. 3
- A. 2
- B. 3
- C. 4
- D. 5
Explanation
Nitric acid is a strong acid, so a 0.001 mol L^-1 HNO3 solution dissociates almost completely and gives [H+] = 0.001 mol L^-1 = 10^-3 mol L^-1. Therefore, pH = -log(10^-3) = 3, so b is correct. A likely mistake is choosing 2 or 4 by mishandling the negative logarithm or the exponent.
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Redox reactions involve oxidation and reduction occurring together, with electrons transferred between species or oxidation numbers changing. The topic covers assigning oxidation states, identifying oxidizing and reducing agents, balancing redox equations by oxidation number or half-reaction methods, and connecting chemical changes with galvanic and electrolytic cells.
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