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Balancing Chemical Equations - Chemical Reactions & Equations, Science, Class 10 Video Lecture

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FAQs on Balancing Chemical Equations - Chemical Reactions & Equations, Science, Class 10 Video Lecture

1. What are chemical reactions and equations?
Ans. Chemical reactions are processes in which substances, called reactants, undergo a transformation to form new substances, known as products. Chemical equations are symbolic representations of these reactions, using chemical formulas and symbols to show the reactants and products involved.
2. Why is it important to balance chemical equations?
Ans. Balancing chemical equations is crucial because it ensures that the law of conservation of mass is obeyed. This law states that matter cannot be created or destroyed in a chemical reaction, only rearranged. By balancing equations, we ensure that the number of atoms of each element is the same on both sides of the equation.
3. How do you balance chemical equations?
Ans. To balance a chemical equation, you need to adjust the coefficients (numbers in front of the chemical formulas) until the number of atoms of each element is the same on both sides of the equation. This is done by applying the principle of conservation of mass and using techniques such as trial and error or algebraic methods.
4. What are some common techniques used to balance chemical equations?
Ans. Some common techniques used to balance chemical equations include: - Adjusting coefficients: Changing the numbers in front of the chemical formulas to balance the number of atoms. - Fractional coefficients: Using fractions as coefficients to balance equations involving odd numbers of atoms. - Redox reactions: Balancing equations involving oxidation-reduction reactions by adding electrons and adjusting oxidation states. - Balancing polyatomic ions: Treating polyatomic ions as single entities and balancing them as a whole.
5. Can chemical equations be unbalanced in real-life situations?
Ans. In real-life situations, chemical equations are always balanced. This is because the law of conservation of mass is a fundamental principle of nature and holds true in all chemical reactions. However, in certain cases, unbalanced equations may be used to represent incomplete reactions or to simplify calculations, but they are not representative of actual chemical processes.
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