How many chlorine atoms are on the products side of the reaction [tex]2 Al +6 HCl \rightarrow 2 AlCl ^2+3 H _2[/tex]?
Answer (2)
Identify the product containing chlorine: A lC l 2 .
Count chlorine atoms per molecule: 2 chlorine atoms in A lC l 2 .
Multiply by the coefficient: 2 × 2 = 4 .
The total number of chlorine atoms is 4 .
Explanation
Problem Analysis We are asked to find the number of chlorine atoms on the products side of the given chemical reaction. The reaction is: 2 A l + 6 H Cl i g h t ha r p oo n u p 2 A lC l 2 + 3 H 2 . We need to carefully examine the products to count the chlorine atoms.
Counting Chlorine Atoms The product containing chlorine is A lC l 2 . Each molecule of A lC l 2 contains 2 chlorine atoms. The balanced equation shows that there are 2 molecules of A lC l 2 produced. Therefore, the total number of chlorine atoms on the product side is 2 × 2 = 4 .
Final Answer Therefore, there are 4 chlorine atoms on the products side of the reaction.
Examples
In chemistry, balancing chemical equations is crucial for predicting the amount of reactants needed and products formed in a chemical reaction. For example, if you're synthesizing a compound in the lab, knowing the exact number of atoms involved helps you calculate the mass of each substance required. This ensures that the reaction proceeds efficiently and safely, preventing waste and potential hazards. Understanding stoichiometry, like counting atoms in a reaction, is fundamental to many scientific and industrial processes.
There are 4 chlorine atoms on the products side of the reaction 2 A l + 6 H Cl → 2 A lC l 2 + 3 H 2 . This is calculated by noting that each molecule of A lC l 2 contains 2 chlorine atoms and there are 2 molecules of A lC l 2 produced. Therefore, 2 × 2 = 4 .
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