If you are working in a chemical or other scientific laboratory, you may need to use a pH meter to find the solution is acidic or basic. When pH or pOH of solution is known, we can calculate H+ and OH- concentrations easily using pH equation. Also, in this online pH calculator, you have to just substitute pH or pOH value and it will give you what is the H+ ion concentrtion of aqueous solution. Also, a real life examples are explained with calculations step by step at the end of this tutorial.
We have two calculators in this online calculator.
This calculator will give H+ concentration in mol dm-3. Kw value is taken as 1 * 10-14 mol2 dm-6. Therefore, results of this online calculator are very much accurate around 250C.
This calculator will give H+ concentration in mol dm-3. Here also, results of this online calculator are very much accurate around 250C.
Because pH = 1, this solution is a strong acidic solution. We can substitute pH = 1 in pH equation.
Because pH = 13, this solution is a strong basic solution. We can substitute pH = 1 in pH equation.
Because pH + pOH = 14 at 250C.
From pOH equation, OH- concentration can be calculated.
Because pH value is given, we can find the H+ concentration directly from pH equation.
Whether acetic acid concentration is given, we cannot get a direct and easy relationship between acetic acid concentration and H+ ion concentration because acetic acid is a weak acid.
In the answer too, you can see H+ ion concentration is much lower than acetic acid concentration.
If there are two or more acids in a aqueous solution, all of them give H+ ions in different amounts. So, there is only one H+ ion concentration throughout the aqueous solution. So, pH value is uniform throughout the solution. When, we measure the pH value of acidic solution and calculate H+ ion concentration, it indicates the overall H+ concentration of solution.
See pH equation. There are only 2 terms in pH equation, H ion concentration and pH value. There is no term for temperature. So, there is no effect for H+ ion concentration when it is calculated from pH value in different temperatures.