The pH of a 0.345 mol dm^-3 solution of nitric acid is 0.46.

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The pH of a 0.345 mol dm^-3 solution of nitric acid is 0.46. This means that the concentration of H+ ions in the solution is 10^-0.46 mol dm^-3. The pH of a solution is a measure of the acidity or alkalinity of the solution, and is defined as the negative logarithm of the concentration of H+ ions in the solution. A lower pH indicates a higher concentration of H+ ions, and a more acidic solution. A higher pH indicates a lower concentration of H+ ions, and a more alkaline solution.

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