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CHECK POINT 1
1. How do you represent a chemical reaction in chemistry?
2. On what law of chemical combination is balancing of chemical equations based?
3. Why is it essential to balance a chemical equation?
4. Write balanced chemical equation for the following reaction:
Zinc + Silver nitrate Zinc nitrate + Silver
+ +
5. Balance the following equation:
Fe2O3 + Al -- Fe + Alo,
1.6 TYPES OF CHEMICAL REACTIONS
Different chemical reactions may be classified in the following main types
1. Combination reactions
2. Decomposition re
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1. A chemical equation is the symbolic representation of a chemical reaction. The reactants ( the starting substances) are written on the left, and the products ( the substances found in the chemical reaction) are written on the right.
3. We need to balance a chemical equation because " law of conservation of mass " state that mass can neither be created nor destroyed in a chical reaction. So number of elements involved in a chemical reaction should remain same at reactant and product side.
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