# pH Calculator

pH Calculator is a free online tool to display the pH value of any chemical solution. Protonstalk pH calculator is one such tool to display the pH value faster and easier.

### Inputs

Following are the inputs of the calculator

1. To Calculate (pH or pOH)
2. Concentration
3. Unit of Concentration (M, mM, uM, nM)
4. Chemical Name/Formula

Example Input:
1. pOH
2. 1
3. M
4. NaOH

### Steps To Use

Step 1: Enter the inputs.
Step 2: Click on the “Calculate” button.
Step 3: The result displays in a new window.

### Outputs

Following are the outputs of the calculator

1. Input interpretation
2. Result
3. Acid-base information (pH, pOH, [H3O+], [OH], % ionization)

## What is pH?

The pH value of any solution is the concentration of $$H^{+}$$ ions in it. pH is a measurement to determine the acidity or alkalinity of a solution. A pH scale ranges from 0 to 14.

Acidic solutions have a pH less than 7 as they have higher concentrations of $$H^{+}$$ ions. Basic solution with lesser $$H^{+}$$ ions concentrations have a pH greater than 7. Solutions with pH value 7 are neutral solutions such as pure water.

pH values of solutions are determined at room temperature i.e $$25^{\circ}$$C as pH changes with temperature as well.

## Example

To calculate pH, we use a formula pH=$$-log_{10}[H^{+}]$$

Consider $$[H^{+}]$$ = $$1.4 \times 10^{-5}$$ then its pH value would be

pH = $$-log_{10}[H^{+}]$$
pH = $$-log_{10}[1.4 \times 10^{-5}]$$
=> pH = 4.85

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