pH Calculator






Please wait.. loading-icon


All solutions contain a certain pH value that depends on the nature of both solute and solvent. A pH value tells the nature of a substance whether it is acidic, alkaline, or neutral. An acid is a species that donates a proton in a solution while a base is a specie that dissociates OH ions in the solution.

The pH value of a substance can be calculated using our online pH calculator. A pH value tells the extent of acidity and basicity of a substance. You would learn the calculation of pH value in this article.

Determination of pH value

Different apparatuses are used in the lab to check the pH of a substance. The conventional method is to use litmus paper. Litmus paper gives different colors when dipped in acidic and basic media. Then the color of the litmus paper is matched with the pH scale and checked the exact value of pH between 0 to 14 on a pH scale.

7 indicated neutral nature, a value below 7 indicates acidic nature, and a value above 7 indicates basic nature. Water is a neutral molecule and its pH is 7. The modern apparatus to determine the pH value is a pH meter.

It contains a column that is dipped in the solution and the digital value of pH appears on the screen. Here, we don’t need a pH scale. These were the methods of determining the pH value in the laboratory but suppose you are in an examination hall where you don’t have any of these apparatus. Then how to calculate the pH value? Here you would use a simple formula to calculate the pH value manually.

Introduction to the pH Calculator

The theoretical calculation of pH is a complex process so we recommend you use a pH calculator for a quick answer. Enter the concentration of hydrogen or hydroxyl ions released in the solution or the simple molarity of the solution and press the “calculate” button. You will the pH value of your desired solution. Also, you can enter the name of the substance like HCl in the case of hydrochloric acid solution.

Calculation of pH value

Theoretically, the pH value for acids is calculated by using the molarity of the solution and the number of free H+ ions released in the solution. In the case of acids, first, calculate the pOH value and then subtract it from 14 to get the pH value (because base releases OH ion). Following is the formula to calculate the pH of the given solution.

pH = -log [H+]
pOH = -log [OH-1]

Concentration of free H+ ions = Molarity x no. of free H+ ions

Let us calculate the pH value of 0.05M H2SO4 solution

H2SO4 2H+ + SO4-
Concentration of free H+ ions = 0.05 x 2
Concentration of free H+ ions = 0.1
pH of H2SO4 = -log [OH-1]
pH of H2SO4 = -log [0.1]
pH of H2SO4 = 1

Answer; The pH of 0.05M sulphuric acid is 1 which means it is a very strong acid and you need to handle it with great care (Lower the pH value, stronger the acid).

How to find ph solution calculator?

There are two ways through which you can find this ph predictor. These ways are:

  1. You can search ph calculator from molarity in the search bar and click on our calculator from Google results.
  2. You can directly open this online calculators website and use ph of a solution calculator from here.

How to use ph value calculator?

It is simple and easy to use this ph of solution calculator. Just follow below steps:

  1. Enter chemical name/formula in the equation bar. Or load example from the dropdown button.
  2. Enter concentration value.
  3. Select the measuring unit of concentration value.
  4. Click on "calculate" button.

Just as you clicked on the button, this ph finder will instantly show you accurate results.

Other related calculators

Find other chemistry calculators on this website and make your calculations easier.

Frequently Asked Questions

Is solution ph calculator accurate?

Yes, ph scale calculator is accurate and provide correct results when you use it.

Is ph log calculator reliable?

This online ph solution calculator is tested by top chemists. It is reliable and efficient and provide instant results.

Alan Walker

Alan Walker

Last Updated June 02, 2022

Studies mathematics sciences, and Technology. Tech geek and a content writer. Wikipedia addict who wants to know everything. Loves traveling, nature, reading. Math and Technology have done their part, and now it's the time for us to get benefits.