Chemistry Practicals Class 10
Testing the pH of various samples with pH papers
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About Simulation
- Through this simulation, you will understand the concept of pH and its significance in determining acidity or alkalinity.
- You will benefit from utilizing this simulation for pH testing, as it provides a virtual environment where you can interactively select and test various substances without the need for physical materials.
- In this simulation, you can dip pH papers into different substances like hydrochloric acid, sodium hydroxide, lemon juice, tomato juice, pure water, and milk, observing colour changes corresponding to the pH of each substance.
- By using this interactive tool, you can learn to effectively use pH papers for assessing the pH levels of different substances.
- With the aid of this simulation, you will be able to identify and differentiate between acidic, neutral, and alkaline substances based on their pH values, further expanding your knowledge and analytical capabilities in chemistry.
Simulation Details
Description
The nature of the chemicals used in the laboratory can be neutral, basic, or acidic. This characteristic of the chemical depends on the release of H+ and OH– ions in its aqueous solution,
Chemicals that release H+ ions are acidic, whereas those that release OH– are basic.
pH: It is a measure of the power of H+ ions in a solution.
- It is defined as the negative logarithm of hydrogen ions in a solution. It is used to determine the strength of an acid or base.
- The term pH refers to the “potential of hydrogen ions.”
- The negative logarithm of H+ molarity is called pH.
The symbol H+ represents the concentration of hydrogen ions in the solution.
- As the pH scale is logarithmic, a ten-fold change in concentration leads to an increase or decrease in an integer value. For example, a pH of 3 is ten times acidic than a pH of 4. Similar to this, a pH of 3 is a hundred times more acidic than a pH of 5. Similarly, a pH of 11 is ten times more acidic than a pH of 10.
pH scale: pH is normally measured in a range of 0–14 (Due to mathematical definition and calculation, it is possible to get negative pH and pH above 14.)
The nature of the solution is determined by its pH value.
pH < 7: Solutions with a pH of less than 7 are considered acidic. These solutions turn blue litmus red.
pH = 7: Solutions with a pH of 7 are considered neutral. Litmus does not change colour when using these solutions.
pH > 7: Solutions with a pH higher than 7 are considered basic. These solutions turn red litmus blue.
Watch this video to learn more about chemistry.
Requirements for this Science Experiment
- Dilute hydrochloric acid
- Dilute sodium hydroxide
- Lemon juice
- Tomato juice
- Pure water
- Milk
- Test tubes
- Droppers
- pH paper strips
- pH scale
- White tile
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