calculate the pH at 25c of 0.080moldm-3 HNO3
To calculate the pH of a solution, you need to know the concentration of hydrogen ions (H+) in the solution. In the case of HNO3 (nitric acid), it is a strong acid that will completely dissociate in water, meaning that every molecule of HNO3 will release one proton (H+).
The concentration of HNO3 is given as 0.080 moldm-3. This means that for every liter of solution, there are 0.080 moles of HNO3. Since HNO3 produces one H+ ion per molecule, the concentration of H+ ions is also 0.080 moldm-3.
To determine the pH of the solution, you can use the pH formula: pH = -log[H+].
In this case, [H+] = 0.080 moldm-3, so the calculation becomes:
pH = -log(0.080) = 1.10.
Therefore, the pH of the 0.080 moldm-3 HNO3 solution at 25°C is approximately 1.10.