How to calculate pH of a solution?

Question

Answer

The pH is calculated by using the expression:pH = - log [H3O+].BT it is not of 10th class syllabus ....it is of 11th and 12th

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Can u do following on me

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[H+(aq)]=10-phThe negative exponent of 10 to which it must be raised in order to express the hydrogen ion concentration in mole per litre.

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PH =log 1/[H+]

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Concentration solution in mole per litre

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-log10 -( h+ )

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Why washing soda also called basic salt?

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It is in class 12
pH of solution = -log(H+)
pOH + pH = 14

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Calculating the pH of a solution is an important aspect of understanding its acidity or alkalinity. pH is a measure of the concentration of hydrogen ions (H+) in a solution and is generally expressed on a logarithmic scale ranging from 0 to 14. A pH value less than 7 indicates acidity, while a pH value greater than 7 indicates alkalinity. The pH of a solution can be determined using various methods, such as using pH indicators, pH meters, or by performing calculations based on the concentration of hydrogen ions.

Using pH Indicators:
1. Choose a suitable pH indicator: pH indicators are substances that change color depending on the pH of the solution. Commonly used indicators include litmus paper, phenolphthalein, and bromothymol blue.
2. Prepare the solution: Dissolve the substance in question in water to create a solution.
3. Add the indicator: Add a few drops of the chosen pH indicator to the solution.
4. Observe the color change: Compare the color of the solution with the color chart provided with the pH indicator to determine the corresponding pH value.

Using a pH Meter:
1. Calibrate the pH meter: Follow the manufacturer's instructions to calibrate the pH meter using buffer solutions of known pH values.
2. Prepare the solution: Dissolve the substance in question in water to create a solution.
3. Immerse the pH electrode: Insert the pH electrode of the meter into the solution and allow it to stabilize.
4. Read the pH value: The pH meter will display the pH value of the solution.

Calculating pH from Concentration:
1. Determine the concentration of hydrogen ions: If you know the concentration of hydrogen ions in the solution, you can calculate the pH using the formula: pH = -log[H+], where [H+] represents the concentration of hydrogen ions.
2. Example: If the concentration of hydrogen ions is 0.001 M, the pH can be calculated as follows:
pH = -log(0.001) = -(-3) = 3

Interpretation of pH Values:
- A pH value of 7 indicates a neutral solution.
- A pH value less than 7 indicates an acidic solution, with lower values representing stronger acidity.
- A pH value greater than 7 indicates an alkaline solution, with higher values representing stronger alkalinity.

Remember that calculating the pH of a solution is an essential step in understanding its chemical properties and determining its suitability for various applications.

Answer

The formula to calculate so is :-Ph= log 1 divided by [H+]

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