What is the pH value of 1 mmol/L hydrochloric acid (HCl)? 0 3 7 11 14
Question
What is the pH value of 1 mmol/L hydrochloric acid (HCl)? 0 3 7 11 14
Solution
The pH of a solution is determined by the concentration of hydrogen ions (H+) in the solution. The pH is calculated using the formula:
pH = -log[H+]
In a 1 mmol/L solution of hydrochloric acid (HCl), the concentration of H+ ions is also 1 mmol/L because HCl is a strong acid and it completely dissociates in water to form H+ and Cl- ions.
So, to calculate the pH of this solution, we substitute the concentration of H+ ions into the formula:
pH = -log(1 mmol/L)
The log of 1 is 0, so the pH of the solution is:
pH = -0
Therefore, the pH of a 1 mmol/L solution of hydrochloric acid (HCl) is 0.
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