Class 10 Exam > Class 10 Videos > Crash Course: Class 10 > Experiment No. 1 A (pH of Samples)
Experiment No. 1 A (pH of Samples) Video Lecture | Crash Course: Class 10
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FAQs on Experiment No. 1 A (pH of Samples) Video Lecture - Crash Course: Class 10
| 1. What is the purpose of determining the pH of samples in Experiment No. 1? |  |
Ans. The purpose of determining the pH of samples in Experiment No. 1 is to measure the acidity or alkalinity of different substances. pH is a measure of the concentration of hydrogen ions in a solution, and it helps in identifying whether a substance is acidic, neutral, or alkaline.
| 2. How is pH measured in Experiment No. 1? | |
Ans. In Experiment No. 1, pH is measured using pH paper or pH indicator solution. The pH paper is dipped into the sample, and its color changes according to the pH of the solution. The color is then matched with a color chart to determine the pH value. Similarly, pH indicator solution changes its color based on the pH of the sample.
| 3. What are some common substances with different pH values that can be tested in Experiment No. 1? | |
Ans. In Experiment No. 1, common substances with different pH values that can be tested include lemon juice (acidic, pH around 2), water (neutral, pH 7), baking soda solution (alkaline, pH around 9), vinegar (acidic, pH around 3), and soap solution (alkaline, pH around 10).
| 4. Why is it important to know the pH of substances in daily life? | |
Ans. Knowing the pH of substances in daily life is important for several reasons. It helps in determining the suitability of substances for various purposes, such as using acidic substances for cleaning or alkaline substances for neutralizing acids. pH also plays a crucial role in maintaining the pH balance of our body and the environment.
| 5. Can the pH of a substance change over time? | |
Ans. Yes, the pH of a substance can change over time. Some substances may undergo chemical reactions that can alter their pH value. For example, a fresh lemon juice can become less acidic as it oxidizes and loses its acidity over time. Similarly, carbonated drinks can become more acidic as the carbon dioxide gas dissolves in water, forming carbonic acid.
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Dec 25, 2024 Last updated |
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