Biochemistry In a solution the concentration of hydrogen ion is 1 x 10-7 moles/litre at 25degC. The pH of the solution will be: A Three B Seven C Nine D Twelve 💡 Explanation In a solution the concentration of hydrogen ion is 1 x 10-7 moles/litre at 25degC. The pH of the solution will be: ✓ Correct Answer: B. Seven