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L7 : China Rose Indicator Test - Acid Base Salts, Science, Class 7 Video Lecture

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FAQs on L7 : China Rose Indicator Test - Acid Base Salts, Science, Class 7 Video Lecture

1. What is the China Rose Indicator test?
Ans. The China Rose Indicator test is a method used to determine whether a substance is an acid, a base, or a neutral salt. It involves adding the China Rose indicator solution to the substance and observing the color change. This test is commonly used in science experiments and laboratory settings to identify the nature of different substances.
2. How does the China Rose Indicator test work?
Ans. The China Rose Indicator test works based on the principle of color change. The China Rose indicator is a pH-sensitive dye that changes color depending on the acidity or basicity of the solution it is added to. When the indicator is added to an acidic solution, it turns red or pink. In contrast, when added to a basic solution, it turns green or yellow. Neutral solutions typically result in no color change or a very faint pink color. By observing the color change after adding the China Rose indicator, we can determine whether the substance is an acid, a base, or a neutral salt.
3. What are acid-base salts?
Ans. Acid-base salts are chemical compounds formed when an acid reacts with a base. These salts contain both positive and negative ions, with the positive ion coming from the base and the negative ion coming from the acid. Acid-base salts are different from neutral salts, which do not have any acidic or basic properties. Acid-base salts can have varying degrees of acidity or basicity, depending on the strength of the acid and base involved in their formation.
4. How can the China Rose Indicator test be used to identify acid-base salts?
Ans. The China Rose Indicator test can be used to identify acid-base salts by observing the color change of the indicator solution after it is added to the salt. If the salt is acidic, the indicator will turn red or pink. If the salt is basic, the indicator will turn green or yellow. Neutral salts will result in no color change or a very faint pink color. By comparing the color change of the indicator with a known acid or base, we can determine whether the salt is acidic or basic in nature.
5. What are some practical applications of the China Rose Indicator test?
Ans. The China Rose Indicator test has various practical applications. It can be used in chemistry labs to identify the acidity or basicity of different substances. It is also commonly used in educational settings to teach students about acid-base reactions and pH indicators. Additionally, the China Rose Indicator test can be used in environmental science to monitor the pH levels of water bodies, as well as in food science to determine the acidity or basicity of certain food products.
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